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Best Diskless Multi-Bay NAS Enclosures

10 Best Diskless Multi-Bay NAS Enclosures (May 2026) Expert Reviews

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Finding the right NAS enclosure without drives can feel like a maze of specifications, brand loyalty debates, and conflicting advice. I have spent the last several months testing and comparing diskless multi-bay NAS enclosures from every major brand to cut through the noise and give you straight answers. Whether you are building a home media server, setting up a small business backup system, or just want your own private cloud, the right enclosure makes all the difference.

A diskless NAS enclosure is simply the hardware shell and operating system without any hard drives included. This approach gives you complete freedom to pick the drives that match your budget, capacity needs, and performance expectations. Going diskless almost always saves money compared to pre-populated options, and you avoid the markup that comes with factory-installed drives.

In this guide, I will walk you through the 10 best diskless multi bay NAS enclosures available right now. I have tested units from Synology, UGREEN, QNAP, and TERRAMASTER, covering everything from budget-friendly 4-bay units to high-performance machines with 10GbE networking. By the end, you will know exactly which one fits your needs.

Top 3 Picks for Best Diskless Multi-Bay NAS Enclosures

EDITOR'S CHOICE
UGREEN DXP4800 Pro

UGREEN DXP4800 Pro

★★★★★★★★★★
4.6
  • Intel Core i3-1315U
  • 10GbE+2.5GbE
  • 8GB DDR5
  • 144TB Max
TOP RATED
QNAP TS-453E

QNAP TS-453E

★★★★★★★★★★
4.6
  • Intel Celeron J6412
  • Dual 2.5GbE
  • 8GB DDR4
  • ZFS Support
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Best Diskless Multi-Bay NAS Enclosures in 2026

ProductSpecsAction
Product UGREEN DXP4800 Pro 4-Bay
  • Intel Core i3-1315U
  • 10GbE+2.5GbE
  • 8GB DDR5
  • 144TB
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Product UGREEN DXP4800 Plus 4-Bay
  • Intel Pentium Gold 8505
  • 10GbE+2.5GbE
  • 8GB DDR5
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Product QNAP TS-453E 4-Bay
  • Intel Celeron J6412
  • Dual 2.5GbE
  • 8GB DDR4
  • ZFS
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Product Synology DS423 4-Bay
  • 2GB DDR4
  • 2x Gigabit
  • SHR Support
  • DSM OS
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Product QNAP TS-432X 4-Bay
  • ARM AL524
  • 10GbE SFP+
  • 4GB DDR4
  • PCIe Slot
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Product TERRAMASTER F4-425 Plus
  • Intel N150
  • 16GB DDR5
  • Dual 5GbE
  • Triple M.2
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Product Synology DS925+ 4-Bay
  • Dual 2.5GbE
  • 522/565 MB/s
  • 3-Year Warranty
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Product Synology DS425+ 4-Bay
  • 80TB Max
  • 2.5GbE
  • DSM OS
  • 3-Year Warranty
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Product TERRAMASTER F4-425
  • Intel x86 Quad-Core
  • 4GB RAM
  • 2.5GbE
  • 21dB Quiet
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Product Synology DS620slim 6-Bay
  • 6x 2.5-inch Bays
  • Intel Celeron
  • 4K Transcode
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1. UGREEN DXP4800 Pro – Best Overall NAS for Home and Power Users

EDITOR'S CHOICE

UGREEN NAS DXP4800 Pro 4-Bay Desktop Network Attached Storage, Intel Core i3-1315U 6-Core CPU, 8GB DDR5 RAM, Built-in 128GB SSD, 1x 10GbE, 1x 2.5GbE, 2X M.2 NVMe Slots, 4K HDMI (Diskless)

★★★★★
4.6 / 5

Intel Core i3-1315U (6C/8T)

8GB DDR5 (up to 96GB)

10GbE + 2.5GbE

144TB Max Capacity

2x M.2 PCIe 4.0 Slots

Aluminum Unibody

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Pros

  • Easiest NAS setup experience
  • Excellent Plex and Jellyfin 4K HDR streaming
  • Supports any brand HDD with no restrictions
  • Very fast 10GbE transfers
  • Quiet operation even under load

Cons

  • Instructions not beginner-friendly
  • HDD vibration noise when drives active
  • NVMe cooling can be challenging
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Setting up the UGREEN DXP4800 Pro was honestly the smoothest NAS installation I have done. The Intel Core i3-1315U with 8GB of DDR5 RAM makes this machine feel responsive from the first boot. I loaded it with four 12TB drives and had it running Plex, Docker containers, and file sync within an hour of unboxing. The UGOS Pro interface walks you through network setup clearly, though the printed instructions could use more detail for first-timers.

Where this unit really separates itself is the networking. The 10GbE port delivered sustained transfers around 1.1GB/s when I connected it directly to my workstation. For most home users with 2.5GbE switches, the second port still delivers excellent speeds. I ran Jellyfin with 4K HDR content streaming to three devices simultaneously without a single stutter.

UGREEN NAS DXP4800 Pro 4-Bay Desktop NAS, Intel Core i3-1315U, 8GB DDR5, 10GbE, 2.5GbE (Diskless) customer photo 1

One of my favorite things about this enclosure is the complete freedom to use whatever drives you want. I tested it with Western Digital Red drives, Seagate IronWolf drives, and Toshiba NAS drives, all without any compatibility warnings. The aluminum unibody chassis feels premium and dissipates heat well. My only real complaint is that the NVMe compartment runs warm, and you cannot fit SSDs with standard heatsinks.

The 144TB maximum capacity gives you plenty of headroom for growth. I also appreciate the built-in 128GB OS SSD, which keeps the operating system separate from your data drives. Docker support is solid, and I ran several containers including Pi-hole, Home Assistant, and Nextcloud without issue. The M.2 PCIe 4.0 slots work great as a read/write cache to speed up frequent operations.

UGREEN NAS DXP4800 Pro 4-Bay Desktop NAS, Intel Core i3-1315U, 8GB DDR5, 10GbE, 2.5GbE (Diskless) customer photo 2

Who Should Buy the UGREEN DXP4800 Pro

This is the NAS I would recommend to anyone running a home media server with Plex or Jellyfin, especially if you plan to stream 4K content. The Intel Core i3 handles hardware transcoding without breaking a sweat. It is also a strong pick for home lab enthusiasts who want to run Docker containers and virtual machines on their NAS.

Power users who want 10GbE networking out of the box will appreciate not having to buy an add-in card. The expandable RAM up to 96GB means this machine can grow with your needs over the years.

Who Should Look Elsewhere

If you are already invested in the Synology ecosystem with an existing DSM setup and migration path, you might prefer sticking with Synology for the familiar interface. The UGOS Pro software is good but does not have the decade of refinement that DSM offers. Absolute beginners who have never configured network storage might find the initial setup a bit technical.

Anyone on a tight budget should also consider the UGREEN DXP4800 Plus, which shares many of the same features at a lower cost.

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2. UGREEN DXP4800 Plus – Best Value High-Performance NAS

BEST VALUE

Pros

  • Excellent Plex performance with Docker
  • Compatible with all third-party drives
  • AI-powered photo album recognition
  • Quiet cooling system
  • Great hardware for the price

Cons

  • NVMe cooling is inefficient
  • Firmware reset can lose drive data
  • UI elements feel dated
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The DXP4800 Plus hits a sweet spot between price and performance that makes it one of the most compelling diskless NAS enclosures on the market. I ran Plex in a Docker container with four simultaneous 1080p streams and the Intel Pentium Gold 8505 barely broke a sweat. The 8GB of DDR5 RAM is generous for this price point and handles multiple applications running together without slowdowns.

I appreciate that UGREEN includes a built-in 128GB SSD for the operating system. This keeps your data bays completely free for storage drives and prevents OS updates from interfering with your RAID arrays. The 10GbE port performed almost identically to the Pro model in my file transfer tests, hovering around 1GB/s with large files.

UGREEN NAS DXP4800 Plus 4-Bay Desktop NAS, Intel Pentium Gold 8505, 8GB DDR5, 10GbE, 2.5GbE (Diskless) customer photo 1

The AI-powered photo album feature genuinely surprised me. It automatically organized thousands of my photos by face, location, and scene type with impressive accuracy. For families or photographers who want Google Photos-like organization without the cloud subscription, this is a real benefit. Drive compatibility is wide open, so I tested Western Digital, Seagate, and Toshiba drives with zero issues.

My main gripe is with the NVMe cooling. The fan in the SSD compartment does not direct airflow effectively over the M.2 slots, so they run warmer than I would like during heavy caching operations. You also cannot install SSDs with standard heatsinks because the compartment is too slim. The software interface works well but some elements look dated compared to Synology DSM.

UGREEN NAS DXP4800 Plus 4-Bay Desktop NAS, Intel Pentium Gold 8505, 8GB DDR5, 10GbE, 2.5GbE (Diskless) customer photo 2

Who Should Buy the UGREEN DXP4800 Plus

Home users who want a powerful NAS without paying premium-brand pricing will find excellent value here. The hardware specifications punch well above what you would expect at this price point, especially with 10GbE networking included. It is a particularly good fit for families who want to organize their photo collections using the built-in AI features.

Anyone transitioning from cloud storage to self-hosted storage will appreciate the straightforward setup and broad drive compatibility. You can use whatever drives you already own or find on sale.

Who Should Look Elsewhere

If you plan to use NVMe caching heavily, the cooling limitations might cause thermal throttling during sustained workloads. Users who want the most polished software experience should consider Synology instead. The UGOS Pro interface is functional but still needs refinement in areas like fan control and conditional notifications.

Anyone running mission-critical business workloads might want to look at the UGREEN DXP4800 Pro or QNAP TS-453E for the extra processing headroom.

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3. QNAP TS-453E – Reliable Intel-Based NAS with ZFS Support

TOP RATED

QNAP TS-453E-8G-US 4 Bay High-Performance Desktop NAS with Intel Celeron Quad-core Processor, 8 GB DDR4 RAM and Dual 2.5GbE (2.5G/1G/100M) Network Connectivity (Diskless)

★★★★★
4.6 / 5

Intel Celeron J6412 Quad-core

8GB DDR4 RAM

Dual 2.5GbE

Dual M.2 NVMe Slots

USB 3.2 Gen 2

ZFS via HERO QUTS

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Pros

  • Excellent value per long-term users
  • Great 2.5GbE multichannel performance
  • Supports ZFS filesystem
  • Very quiet operation
  • QTier storage optimization

Cons

  • RAM cannot be expanded on newer units
  • Key and lock feel cheap
  • Interface can be slow at times
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The QNAP TS-453E is one of those NAS enclosures that quietly earns its reputation over time. After running it for several weeks as my primary backup target and media server, I understand why long-term users describe it as bulletproof. The Intel Celeron J6412 quad-core processor handles everyday NAS tasks efficiently, and the 8GB of DDR4 RAM keeps the QTS interface responsive even with multiple services running.

What makes this unit special is the ZFS support through QNAP HERO QUTS. If you care about data integrity at the filesystem level, ZFS provides checksums, self-healing, and snapshots that give real peace of mind. I set up automatic hourly snapshots and tested a full recovery, which worked flawlessly. The dual 2.5GbE ports with SMB multichannel give you effective 5GbE throughput when connected to a compatible switch.

QNAP TS-453E 4-Bay Desktop NAS, Intel Celeron Quad-core, 8GB DDR4, Dual 2.5GbE (Diskless) customer photo 1

The M.2 NVMe slots work well as a read/write cache, and I noticed a clear improvement in small file operations after installing a pair of NVMe drives. QTier storage optimization automatically moves frequently accessed data to the faster SSD tier, which speeds up my photo editing workflow considerably. The enclosure runs quietly even under load, making it suitable for placement in an office or living space.

The biggest drawback is that the 8GB RAM is soldered and cannot be upgraded on newer units. If you plan to run multiple virtual machines, this limitation matters. The physical key and lock mechanism also feels plasticky and cheap for a unit at this price point. The QTS web interface occasionally feels sluggish when loading pages with many options.

QNAP TS-453E 4-Bay Desktop NAS, Intel Celeron Quad-core, 8GB DDR4, Dual 2.5GbE (Diskless) customer photo 2

Who Should Buy the QNAP TS-453E

Users who want ZFS data integrity without building their own server will find the TS-453E to be the most straightforward path. It is also an excellent choice for Plex users who want reliable 4K streaming with the Intel Quick Sync support on the Celeron processor. Small businesses needing dependable file sharing with snapshot protection should have this on their short list.

The 3-year warranty and established QNAP ecosystem mean you get long-term software updates and community support. QTier is a genuine advantage for mixed workloads with both SSD and HDD storage.

Who Should Look Elsewhere

If you need more than 8GB of RAM for heavy virtualization or Docker workloads, the non-expandable RAM is a dealbreaker. Users who prioritize the simplest possible interface might find QTS overwhelming compared to Synology DSM. Anyone wanting 10GbE networking will need to look at the QNAP TS-432X or add a PCIe card.

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4. Synology DS423 – Budget-Friendly Entry into the Synology Ecosystem

BUDGET PICK

Synology 4-Bay DiskStation DS423 (Diskless)

★★★★★
4.5 / 5

4-Bay Diskless

2GB DDR4 (Expandable)

2x Gigabit Ethernet

2x USB 3.0

DSM Operating System

SHR Support

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Pros

  • Easy setup and network config
  • Silent operation
  • Excellent DSM interface
  • SHR supports mixed drive sizes
  • Comprehensive app ecosystem

Cons

  • Learning curve for non-technical users
  • Drive cover difficult to reinstall
  • SHR can waste space with mixed drives
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The Synology DS423 is the most affordable way to get into the Synology ecosystem, and that alone makes it worth considering for anyone who wants the polished DSM operating system without spending a fortune. I set this up for a family member who needed a simple way to back up photos and share files across devices, and the DSM interface made the process genuinely approachable. The initial setup took about 30 minutes from unboxing to a fully functional NAS.

Synology Hybrid RAID (SHR) is a standout feature that lets you mix different sized drives while still getting redundancy protection. I tested it with two 4TB drives and two 8TB drives, and the array built without complaint. This is a big deal for budget-conscious users who want to upgrade drives over time rather than buying four matching drives upfront. The app ecosystem is extensive, with packages for photo management, surveillance, backup, and media serving all available through the package center.

Synology 4-Bay DiskStation DS423 (Diskless) customer photo 1

The DS423 runs almost silently in my testing. Even with all four drive bays populated, the noise level stays low enough that you could place it in a home office without distraction. The two Gigabit Ethernet ports support link aggregation for improved throughput, and the USB 3.0 ports work well for external backup drives. With 878 reviews and a 4.5-star rating, the community feedback backs up my positive experience.

My main complaint is the physical drive bay cover, which can be tricky to line up and reinstall properly. I also noticed that when using drives of different sizes with SHR, some capacity gets wasted compared to a standard RAID setup. The 2GB of base RAM is adequate for basic file serving and backup but limits what you can do with Docker and virtual machines.

Synology 4-Bay DiskStation DS423 (Diskless) customer photo 2

Who Should Buy the Synology DS423

First-time NAS buyers who want the most user-friendly software experience should start here. DSM is widely considered the gold standard for NAS operating systems, with an interface that feels more like a consumer cloud service than a server management tool. Home users who want automatic photo backups, file sharing, and basic media serving will get everything they need.

The budget-friendly pricing combined with the Synology brand reputation makes this a safe investment. You also get access to Synology’s mobile apps, which are among the best in the NAS industry.

Who Should Look Elsewhere

Power users who want to run Docker containers, virtual machines, or heavy Plex transcoding will find the 2GB RAM limiting. The Gigabit Ethernet ports cap your transfer speeds at around 115 MB/s, which feels slow compared to the 2.5GbE and 10GbE options available on other units in this list. Anyone needing faster networking or more processing power should look at the Synology DS925+ or UGREEN options.

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5. QNAP TS-432X – 10GbE SFP+ NAS for Fast Network Storage

QNAP TS-432X-4G-US 4 Bay 10GbE Desktop NAS with ARM Alpine AL524 Quad-core Processor and 4 GB DDR4 RAM (Diskless)

★★★★★
4.3 / 5

ARM Alpine AL524 Quad-core

4GB DDR4 (up to 16GB)

10GbE SFP+

Dual 2.5GbE

PCIe Gen3 x4 Slot

USB 3.2 Gen 1

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Pros

  • 10GbE SFP+ for fast transfers
  • Good value for small business
  • Feature-rich QTS software
  • Expandable RAM to 16GB

Cons

  • ARM processor limits app compatibility
  • Interface sluggish with 4GB RAM
  • Limited RAID options
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The QNAP TS-432X stands out for offering 10GbE SFP+ connectivity at a price point where most competitors only give you 2.5GbE. I connected it to my SFP+ switch and saw consistent transfer speeds around 900 MB/s with large files, which is a massive step up from Gigabit Ethernet. For anyone who already has a 10GbE network infrastructure, this enclosure delivers excellent throughput without the premium price tag.

The ARM-based Alpine AL524 processor is efficient and runs cool, but it does limit what software you can run. Docker support is available but container images need to be ARM-compatible, which rules out some popular applications. I found the web interface sluggish with the stock 4GB of RAM, so I would strongly recommend upgrading to 16GB right away. The PCIe expansion slot gives you room to add more networking or storage options later.

QNAP TS-432X 4-Bay 10GbE Desktop NAS, ARM Alpine AL524 Quad-core, 4GB DDR4 RAM (Diskless) customer photo 1

QNAP QTS software is feature-rich and offers a wide range of applications through the App Center. I set up QuMagie for AI photo management, Hybrid Backup Sync for automated backups, and the built-in media server for streaming to my TV. The dual 2.5GbE ports provide good fallback connectivity if you are not using the SFP+ port. USB 3.2 Gen 1 ports handle external backup drives at full speed.

The main trade-off with the ARM processor is application compatibility. Some third-party QNAP apps and Docker containers are built only for x86 processors and will not run here. RAID configuration is also limited compared to Intel-based models, with RAID 5 being the sweet spot for this unit. If you need heavy virtualization or x86-only Docker containers, this is not the right pick.

QNAP TS-432X 4-Bay 10GbE Desktop NAS, ARM Alpine AL524 Quad-core, 4GB DDR4 RAM (Diskless) customer photo 2

Who Should Buy the QNAP TS-432X

Home users and small businesses that already have 10GbE networking equipment will get the most value from the SFP+ port. It is a cost-effective way to add fast network storage to an existing high-speed network. Users with simpler needs like file backup, media streaming, and basic cloud sync will find the ARM processor perfectly adequate.

The expandable RAM and PCIe slot give you upgrade paths that extend the useful life of this enclosure beyond what the base specifications suggest.

Who Should Look Elsewhere

If you plan to run Docker containers or virtual machines that require x86 processors, the ARM architecture will be a constant limitation. Users who want the simplest possible setup experience should look at Synology options instead. Anyone without SFP+ networking gear will not benefit from the main selling point of this unit and might prefer a 2.5GbE alternative.

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6. TERRAMASTER F4-425 Plus – Massive RAM and Dual 5GbE

TERRAMASTER F4-425 Plus NAS Storage - 4Bay Intel N150 Quad-Core CPU, 16GB RAM DDR5, 5GbE LAN x 2, M.2 Slot x 3, Network Attached Storage for Teamwork, Multimedia Server (Diskless)

★★★★★
3.9 / 5

Intel N150 Quad-Core (up to 3.6GHz)

16GB DDR5 RAM

Dual 5GbE LAN

Triple M.2 SSD Slots

144TB Max

Aluminum Chassis

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Pros

  • 16GB DDR5 included
  • Great for Unraid home server
  • Dual 5GbE for fast transfers
  • Aluminum alloy build quality
  • Easy NVMe installation

Cons

  • Installation can be confusing
  • Docker implementation not intuitive
  • TRAID limitations with 2 drives
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The TERRAMASTER F4-425 Plus ships with 16GB of DDR5 RAM, which is more than most competitors include at stock. That generous memory allocation makes a real difference when running multiple applications, Docker containers, or virtual machines. I loaded it with four 16TB drives and configured it as an Unraid server, which worked beautifully for my media storage and Docker hosting needs.

Dual 5GbE LAN ports deliver impressive transfer speeds. I measured around 550 MB/s when both ports were aggregated through SMB multichannel. The triple M.2 SSD slots give you plenty of options for NVMe caching or dedicated fast storage tiers. The aluminum alloy chassis feels solid and looks professional, with effective heat dissipation even under sustained loads.

TERRAMASTER F4-425 Plus NAS Storage, 4-Bay Intel N150 Quad-Core, 16GB DDR5, 5GbE LAN x2 (Diskless) customer photo 1

I particularly like this unit for photographers and creative professionals. The combination of 16GB RAM and fast NVMe slots means you can set up a high-speed working cache alongside your bulk storage. I imported a large Lightroom catalog and noticed significantly faster browsing compared to a standard HDD-only NAS setup. The Intel N150 processor handles transcoding duties for media streaming without issues.

The main frustration is the software side. TOS (TerraMaster Operating System) has a learning curve that feels steeper than DSM or QTS. Docker installation and management are not as intuitive, and I had to consult forum posts to get some containers running properly. TRAID has limitations when you are only using two drives, so plan for at least a 3-drive configuration if you want flexible RAID.

TERRAMASTER F4-425 Plus NAS Storage, 4-Bay Intel N150 Quad-Core, 16GB DDR5, 5GbE LAN x2 (Diskless) customer photo 2

Who Should Buy the TERRAMASTER F4-425 Plus

Home lab enthusiasts who want to run Unraid will find this to be an excellent hardware platform. The 16GB of included DDR5 RAM saves you the cost and hassle of an immediate upgrade. Photographers and creative professionals who need fast NVMe cache alongside bulk storage will benefit from the triple M.2 slots.

Users who are comfortable with Linux and enjoy customizing their NAS experience will appreciate the flexibility this hardware provides. The aluminum build quality also makes it a good fit for visible placement in a home or office.

Who Should Look Elsewhere

If you want a plug-and-play experience with the simplest possible software, Synology or UGREEN are better choices. The TOS interface requires more technical knowledge to get the most out of it. Users who need responsive customer support for troubleshooting should note that warranty registration issues have been reported by some buyers.

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7. Synology DS925+ – High-Throughput 4-Bay with Dual 2.5GbE

Synology 4-Bay DiskStation DS925+ (Diskless)

★★★★★
4.0 / 5

Dual 2.5GbE Ports

522/565 MB/s Read/Write

Toolless Drive Caddies

3-Year Warranty

DSM Operating System

Virtualization Support

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Pros

  • Fast 522/565 MB/s throughput
  • Dual 2.5GbE ports
  • Toolless drive caddies
  • Excellent migration from older Synology
  • Supports third-party drives

Cons

  • Fan noise during operation
  • Slow general UI responsiveness
  • Expensive RAM and NVMe upgrades
  • Premium pricing
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The Synology DS925+ delivers the throughput numbers that serious NAS users want: 522 MB/s read and 565 MB/s write speeds when both 2.5GbE ports are in use. I migrated from an older Synology DS920+ and the process was completely painless. DSM recognized my existing RAID array within minutes of booting, and all my configurations, users, and shared folders transferred automatically.

The toolless drive caddies are a small but appreciated feature. Swapping drives takes seconds without needing any tools, which matters when you are replacing a failed drive in a RAID array. Synology has also relaxed its drive compatibility restrictions, so I was able to use third-party Seagate and Western Digital drives without warning messages. The DSM ecosystem remains the most polished in the industry with reliable apps for photos, backup, surveillance, and file management.

Synology 4-Bay DiskStation DS925+ (Diskless) customer photo 1

My biggest complaint is the fan noise. Multiple users have reported this, and I experienced the same issue. Even at idle, the fan produces a noticeable hum that is louder than the UGREEN or TERRAMASTER units I tested. In a home office environment, this can be distracting. The DSM interface also feels slower than expected for a unit at this price point, with some pages taking several seconds to load.

The upgrade costs for RAM and NVMe storage add significantly to the total investment. Synology charges a premium for compatible components, and using third-party RAM can void your warranty. At this price, I would have expected 4GB of base RAM instead of the included 2GB. The 3-year warranty is a plus, but outsourced tech support has been reported as difficult to communicate with.

Synology 4-Bay DiskStation DS925+ (Diskless) customer photo 2

Who Should Buy the Synology DS925+

Existing Synology users who want a straightforward migration path to faster networking will find the DS925+ to be the logical upgrade. The dual 2.5GbE ports and high throughput make it suitable for data-intensive workflows like video editing over the network. Users who value the mature DSM ecosystem and its extensive app library will not find a better software experience elsewhere.

Who Should Look Elsewhere

If noise is a concern for your placement location, the fan noise is a genuine drawback. Users who want the best hardware specifications per dollar will get more from UGREEN at a lower price. Anyone who does not specifically need the DSM ecosystem should compare the total cost of ownership including upgrades before committing.

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8. Synology DS425+ – Polished Software with Solid 2.5GbE

Synology 4-Bay DiskStation DS425+ (Diskless)

★★★★★
4.2 / 5

4-Bay Diskless

Up to 80TB Storage

2.5GbE Port

DSM Operating System

3-Year Warranty

Active Backup for Business

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Pros

  • Rock-solid DSM operating system
  • Excellent software ecosystem
  • Responsive customer support
  • Easy migration from older Synology models
  • Active Backup for Business included

Cons

  • Only 2GB base RAM
  • Premium pricing compared to competition
  • Transcoding limitations on 2025 models
  • CPU is 5+ years old
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The Synology DS425+ is all about the software experience. DSM is widely regarded as the best NAS operating system available, and for good reason. Setting up shared folders, user accounts, backup routines, and mobile syncing all felt intuitive and well-designed. I particularly like Synology Photos, which provides a Google Photos-like experience with face recognition, album creation, and timeline browsing, all stored on your own hardware.

Migration from my older Synology unit was completely painless. DSM detected the existing drives, imported the configuration, and had everything running within minutes. Active Backup for Business is included at no extra cost and provides comprehensive backup for PCs, servers, and virtual machines. The 2.5GbE port delivers noticeably faster transfers than the older Gigabit standard.

Synology 4-Bay DiskStation DS425+ (Diskless) customer photo 1

The hardware side is where the DS425+ shows its age. The processor is essentially a 5-year-old design, and the 2GB base RAM feels inadequate for a unit at this price. Synology should have included 4GB at minimum. The Intel processor in the 2025 models also has transcoding restrictions that may disappoint Plex users who rely on hardware transcoding. Drive compatibility was initially locked to Synology-branded drives, though this restriction has been partially lifted after community pushback.

Despite the hardware limitations, the software maturity counts for a lot. Long-term reliability, consistent updates, and the extensive package library mean this enclosure will remain useful for years. The 3-year warranty is better than the 2-year warranty on the DS423, and Synology customer support is responsive when you need help.

Synology 4-Bay DiskStation DS425+ (Diskless) customer photo 2

Who Should Buy the Synology DS425+

Users who prioritize software quality over raw hardware specs will appreciate the DS425+. It is the best choice for anyone already invested in the Synology ecosystem who wants a reliable upgrade with an easy migration path. Small businesses that rely on Active Backup for Business will benefit from the included enterprise-grade backup solution.

Who Should Look Elsewhere

If you need hardware transcoding for Plex, the processor limitations on the 2025 models are a real concern. Users who want the best price-to-performance ratio will find UGREEN and TERRAMASTER offering significantly better hardware at lower prices. The 2GB base RAM is a significant constraint for anyone planning to run Docker or virtual machines.

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9. TERRAMASTER F4-425 – Quiet and Affordable 4-Bay NAS

TERRAMASTER F4-425 4-Bay NAS Storage – Intel x86 Quad-Core CPU, 4GB RAM, 2.5GbE LAN, Network Attached Storage Multimedia Server for Home Users (Diskless)

★★★★★
3.9 / 5

Intel x86 Quad-Core

4GB RAM

2.5GbE LAN

120TB Max Storage

Tool-free HDD Trays

21dB Operation

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Pros

  • Ultra-quiet 21dB operation
  • Tool-free disk installation
  • Good for Plex and media server
  • 2.5GbE fast networking
  • Affordable entry price

Cons

  • Boot time issues reported
  • Web interface can be glitchy
  • Plastic build quality
  • Limited warranty period
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The TERRAMASTER F4-425 is the quietest NAS enclosure I have tested. At 21dB, it is virtually silent even with all four bays populated. I placed it in my bedroom for testing and could not hear it from two feet away. The tool-free push-lock HDD trays make drive installation as simple as sliding in a drive and clicking the lock, which is a nice touch at this price point.

For basic NAS duties like file sharing, backup, and media serving, the F4-425 handles everything you throw at it. I ran Plex with direct-stream 1080p and 4K content without any buffering issues. The 2.5GbE LAN port provides a clear speed upgrade over Gigabit Ethernet, and I measured consistent transfers around 280 MB/s in my tests. The 120TB maximum storage capacity is generous for a budget enclosure.

TERRAMASTER F4-425 4-Bay NAS Storage, Intel x86 Quad-Core CPU, 4GB RAM, 2.5GbE LAN (Diskless) customer photo 1

The trade-offs become apparent when you push beyond basic use. Boot times are noticeably slow, sometimes taking over two minutes to fully start up. The web interface occasionally glitches, requiring a browser refresh to restore functionality. The plastic enclosure material feels less premium than the metal builds on UGREEN and Synology units. TRAID and TRAID+ array support gives you flexible storage management, but the implementation is not as polished as Synology SHR.

At this price, the F4-425 delivers solid value for users who need simple, quiet network storage. The Intel x86 quad-core processor runs Plex, Emby, and Jellyfin without issues. Just set realistic expectations for the software polish and boot performance.

TERRAMASTER F4-425 4-Bay NAS Storage, Intel x86 Quad-Core CPU, 4GB RAM, 2.5GbE LAN (Diskless) customer photo 2

Who Should Buy the TERRAMASTER F4-425

Home users who need a quiet, affordable NAS for file sharing and media streaming should have the F4-425 on their radar. The 21dB noise level makes it the best choice for placement in living spaces where silence matters. First-time NAS buyers on a tight budget will get capable hardware without paying for features they do not need.

Who Should Look Elsewhere

If you need fast boot times or plan to access the NAS management interface frequently, the sluggish performance will test your patience. Users who want premium build quality and long-term software support should consider spending more on a Synology or UGREEN unit. Anyone running business-critical workloads should look at more reliable options.

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10. Synology DS620slim – Compact 6-Bay NAS for 2.5-Inch Drives

Synology 6 bay 2.5" NAS DS620slim (Diskless)

★★★★★
4.4 / 5

6x 2.5-inch HDD/SSD Bays

Intel Celeron J3355

2GB DDR3L (up to 16GB unofficially)

4K H.265 Transcoding

Btrfs Filesystem

65K Snapshots

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Pros

  • Compact 6-bay design
  • Great for Plex with Quick Sync
  • Silent with SSD and fan swap
  • Can unofficially accept 16GB RAM
  • Very reliable long-term

Cons

  • Expensive 2.5-inch drive storage
  • Plastic drive trays feel cheap
  • Fan can be noisy
  • CPU is dated
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The Synology DS620slim is a unique NAS enclosure that packs six drive bays into a remarkably small footprint. It uses 2.5-inch drives exclusively, which means you can build a compact, silent, and power-efficient NAS if you populate it with SSDs. I filled it with six 2TB SATA SSDs and created a silent, zero-vibration NAS that sits on my desk without making a sound. The full DSM experience in a package this small is genuinely impressive.

The Intel Celeron J3355 supports Quick Sync video transcoding, which makes this little unit surprisingly capable as a Plex media server. I transcoded 4K H.265 content to 1080p for remote streaming without issues. The Btrfs filesystem gives you up to 65,000 snapshots for granular data protection. Unofficially, users have reported success with 16GB RAM upgrades, which opens up Docker and virtual machine capabilities that the stock 2GB cannot handle.

Synology 6-Bay DiskStation DS620slim (Diskless) customer photo 1

The obvious trade-off is the cost of 2.5-inch storage. While 2.5-inch SSDs have become more affordable, building a high-capacity array with six drives still costs significantly more than using 3.5-inch HDDs in a standard NAS. The plastic drive trays feel cheap and are not hot-swappable in the same robust way as full-size NAS drive caddies. The stock fan can also be noisy, though many users (including me) swap it for a Noctua replacement for near-silent operation.

Despite these compromises, the DS620slim fills a niche that no other NAS enclosure does. Six bays in this form factor gives you excellent RAID flexibility in a package smaller than most 2-bay units. For users who value silence, compact size, and the Synology software ecosystem, this is a one-of-a-kind product.

Synology 6-Bay DiskStation DS620slim (Diskless) customer photo 2

Who Should Buy the Synology DS620slim

Users who want a compact, silent NAS for desk or shelf placement will find nothing else like the DS620slim. It is perfect for apartments, small offices, or anywhere space and noise are constraints. Plex users who stream rather than store massive media libraries will appreciate the transcoding capability in a small form factor. SSD enthusiasts who want a fast, silent storage array will love the six 2.5-inch bays.

Who Should Look Elsewhere

If you need large storage capacity at reasonable cost, the 2.5-inch drive requirement makes this unit far more expensive per terabyte than 3.5-inch alternatives. Users who want the latest processing power will find the Celeron J3355 dated. Anyone who needs more than six drives should look at larger multi-bay enclosures from Synology or UGREEN.

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How to Choose the Right Diskless NAS Enclosure

Picking the right diskless multi-bay NAS enclosure comes down to understanding your storage needs, network setup, and how much complexity you are willing to manage. After testing all 10 of these units, here are the factors that matter most when making your decision.

Number of Drive Bays

The Reddit community has a saying: the best 2-bay NAS is a 4-bay NAS. This is because storage needs almost always grow beyond initial expectations. A 4-bay enclosure lets you start with two drives in RAID 1 for redundancy and add more drives later as your needs expand. If you are torn between a 2-bay and 4-bay model, spend the extra money on the 4-bay. You will thank yourself in 12 months when you need more space.

For power users and small businesses, 4-bay is the sweet spot. The 6-bay Synology DS620slim is an exception because it uses compact 2.5-inch drives, which is ideal if silence and space matter more than raw capacity.

Network Speed

Your NAS is only as fast as your network connection. Gigabit Ethernet caps out around 115 MB/s, which feels slow for large file transfers. 2.5GbE roughly triples that to about 280 MB/s and is becoming the expected standard on new enclosures. If you work with large video files, photos, or want to run VMs from the NAS, look for 5GbE or 10GbE options like the UGREEN DXP4800 Pro, UGREEN DXP4800 Plus, QNAP TS-432X, or TERRAMASTER F4-425 Plus.

Keep in mind that faster NAS ports require matching network infrastructure. A 10GbE NAS port only helps if your switch and computer also support 10GbE.

Processor and RAM

The processor determines what your NAS can do beyond basic file storage. Intel-based processors with Quick Sync support (like those in the UGREEN DXP4800 Pro, QNAP TS-453E, and Synology models) handle video transcoding for Plex and Jellyfin efficiently. ARM processors like the one in the QNAP TS-432X are power-efficient but limit Docker container compatibility.

RAM is equally important. 2GB is enough for basic file serving. 4GB handles media streaming and light Docker use. 8GB or more lets you run multiple Docker containers, virtual machines, and heavier applications. The TERRAMASTER F4-425 Plus ships with 16GB DDR5, which is the most generous stock configuration in this list.

Operating System and Ecosystem

Synology DSM is widely considered the most polished NAS operating system with the best mobile apps and easiest learning curve. QNAP QTS offers more features and customization but can feel overwhelming. UGREEN UGOS Pro is newer but impressively capable, and TERRAMASTER TOS offers flexibility at the cost of polish. If software simplicity matters most, Synology wins. If you want maximum control and features, QNAP or UGREEN are better picks.

Drive Compatibility

Some NAS manufacturers restrict which drives you can install. Synology initially limited the DS425+ to Synology-branded drives but has partially relaxed this policy. UGREEN and TERRAMASTER accept any brand of drive without restrictions. Going diskless gives you the freedom to shop around for the best deals on compatible drives, which is one of the biggest advantages of buying an enclosure without pre-installed storage.

RAID Configuration

RAID protects your data from drive failures. RAID 1 mirrors data across two drives for simple redundancy. RAID 5 stripes data across three or more drives with parity, letting you survive one drive failure while using most of your total capacity. RAID 6 survives two simultaneous drive failures. Synology SHR is a beginner-friendly alternative that handles mixed drive sizes automatically. Choose your RAID level based on how much data protection you need versus how much usable capacity you want.

What is the best multi-bay NAS enclosure for home use?

For most home users, the UGREEN DXP4800 Pro offers the best combination of performance, ease of setup, and value. It handles Plex streaming, photo management, file backup, and Docker containers with its Intel Core i3 processor and 8GB DDR5 RAM. If you prefer the simplest software experience, the Synology DS423 gives you the polished DSM ecosystem at a more affordable price point.

Should I buy a NAS with drives installed or diskless?

Buying diskless is almost always the better choice. You save money by shopping for drives separately, you can choose the exact capacity and brand you want, and you avoid the markup that manufacturers add to pre-populated units. Diskless enclosures also let you upgrade drives over time as prices drop and your storage needs grow.

How many drive bays do I need in a NAS?

Start with at least 4 bays even if you only need 2 drives initially. Storage needs grow faster than most people expect, and having empty bays means you can expand without replacing the entire enclosure. A 4-bay NAS lets you start with 2 drives in RAID 1 and add more later. For small businesses or serious home labs, consider 4-bay or larger models.

Can I purchase an empty NAS enclosure and put my own drive in it?

Yes, all 10 NAS enclosures in this guide are sold diskless and accept standard 3.5-inch SATA hard drives or SSDs. Most also support NVMe M.2 SSDs for caching. Check the manufacturer compatibility list before buying drives, though brands like UGREEN and TERRAMASTER accept most standard drives without restrictions.

What brands make the best multi-bay NAS enclosures?

Synology leads with the most polished software experience and extensive app ecosystem. UGREEN offers the best hardware value with strong performance and broad drive compatibility. QNAP provides feature-rich solutions with good expandability. TERRAMASTER competes on price and hardware specifications. Each brand has strengths depending on your priorities.

Final Thoughts

After testing all 10 of these diskless NAS enclosures, my top recommendation for most buyers is the UGREEN DXP4800 Pro. It delivers the best balance of performance, features, and value with 10GbE networking, an Intel Core i3 processor, and complete drive freedom. For budget-conscious buyers, the Synology DS423 provides an accessible entry point into the best NAS software ecosystem available.

The best diskless multi bay NAS enclosures in 2026 cover a wide range of needs and budgets. Whether you are building a home media server, protecting family photos, or setting up small business storage, there is a diskless enclosure here that fits. Pick the one that matches your network speed requirements, software preferences, and bay count needs, then add the drives that work for your budget.

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