8 Best 4-Bay NAS for Home Offices in 2026
8 best 4-bay NAS for home offices in 2026, compared on RAID options, true total cost with drives, rebuild risk, and upgrade paths for growing storage needs.
Comparison Table
| Pick | Product | |
|---|---|---|
| Best Overall | UGREEN NAS DXP4800 Plus 4-Bay NAS, Intel Pentium Gold 8505 | Check price |
| Best for Drive Compatibility Peace of Mind | Synology 4-Bay DiskStation DS925+ (Diskless) | Check price |
| Best Value Synology | Synology DS423 4-Bay Diskless NAS | Check price |
| Best Direct-Attached Alternative | QNAP TR-004 4-Bay USB Type-C Direct Attached Storage (Diskless) | Check price |
| Best Budget Enclosure | TERRAMASTER D4-320 External Hard Drive Enclosure, 4-Bay USB 3.2 Gen2 | Check price |
| Best 2-Bay Alternative | UGREEN NAS DXP2800 2-Bay, Ideal for Content Creators | Check price |
| Best Budget 2-Bay Alternative | UGREEN NAS DH2300 2-Bay Desktop NAS, Supports 64TB | Check price |
| Best Simple Backup Alternative | Synology DS223 Home & Office Backup Hub (2-Bay Diskless NAS) | Check price |
Prices are approximate. Check Amazon for current pricing before purchasing.
A 4-bay NAS is the point where a home office storage setup graduates from a simple 2-drive mirror into real RAID flexibility, RAID 5, hybrid RAID, or RAID 10 all become options, each with a different balance of usable capacity, speed, and rebuild risk. That flexibility is also where the true cost of ownership stops being obvious, since the enclosure price is only part of what you'll actually spend.
Below are 8 4-bay NAS and storage enclosures we evaluated on RAID support, true total cost including drives, network speed, and processor capability, ranging from a $151.99 diskless direct-attached enclosure to a $700 diskless Synology Plus-series NAS.
6 Criteria to Look For Before Buying a 4-Bay NAS for Home Office
Key buying criteria so you get the right fit the first time.
The enclosure price is only part of the true cost
A 4-bay enclosure priced around $600-700 plus 4 NAS-grade 8TB drives at roughly $180 each adds up to $1,320 or more in total investment. Always budget for drives separately when comparing a diskless 4-bay NAS to a 2-bay unit or a cheaper direct-attached enclosure.
RAID 5, hybrid RAID, and RAID 10 solve different problems
RAID 5 uses 3 drives for data plus 1 for parity, giving about 75% usable capacity and tolerating 1 drive failure, the most common recommendation for general use. Hybrid RAID lets you mix drive sizes and expand one drive at a time, better for a gradual upgrade path. RAID 10 gives only 50% usable capacity but the fastest read and write speeds, best suited to Plex or other heavy read workloads.
Understand the rebuild risk window before you need it
A 4-bay RAID 5 array with 8TB drives can take 12 to 48 hours to rebuild after a single drive failure. During that rebuild, performance degrades and a second drive failure means total data loss, which is why some buyers choose RAID 10 or hybrid RAID for faster, less risky rebuilds.
Network-attached and direct-attached storage are not the same thing
A true NAS connects over Ethernet and can be accessed by multiple devices on the network at once, even remotely. A direct-attached enclosure like the QNAP TR-004 or TERRAMASTER D4-320 connects via USB to a single computer, which must stay powered on for anything else to reach that storage. Confirm which type you're buying before assuming multi-device access.
Check whether you actually need 4 bays before buying
If your real storage need is basic backup or a small content library, a 2-bay NAS with RAID 1 mirroring is meaningfully cheaper than any true 4-bay unit and its 4 drives. Reserve the 4-bay purchase for when you specifically need RAID 5/10 flexibility or capacity beyond what 2 drives can reasonably provide.
Drive compatibility restrictions add real cost on newer models
Synology's 2024-and-newer Plus-series models display compatibility warnings in DSM for non-Synology-branded drives. The NAS still functions, but Synology-branded drives cost 15-30% more than equivalent third-party NAS drives. Factor this into your total cost calculation if you're buying a recent Synology Plus-series unit.
8 Best 4-Bay NAS for Home Offices in 2026
UGREEN NAS DXP4800 Plus 4-Bay NAS, Intel Pentium Gold 8505
About this pick
The DXP4800 Plus pairs a genuinely capable 5-core Intel Pentium Gold processor with 4 drive bays, enough compute headroom to run Plex transcoding, Docker containers, and RAID management simultaneously without the NAS becoming the bottleneck in your workflow.
As a diskless unit, the enclosure price is only the starting point, budget for 4 NAS-grade drives on top, but the Intel processor and expandable RAM give it a longer useful life than value-tier ARM-based 4-bay units as your home office needs grow.
Best for: Home offices wanting Intel-level performance headroom in a 4-bay unit
Check price on AmazonPros
- +Genuinely capable Intel CPU for transcoding and multitasking
- +Full RAID flexibility including RAID 5 and RAID 10
- +Expandable RAM for future workloads
- +Docker/container support for advanced home office use
Cons
- −Diskless, drives are a significant added cost
- −Overkill CPU if you only need basic file backup
- −Setup complexity higher than a simpler 2-bay unit
Synology 4-Bay DiskStation DS925+ (Diskless)
About this pick
The DS925+ is Synology's current Plus-series 4-bay, running DSM's polished software with Hybrid RAID (SHR) support that lets you mix and expand drive sizes over time rather than committing to matched drives upfront. That gradual upgrade path is a real advantage over standard RAID 5 for a home office that grows incrementally.
Be aware that Synology's 2024-and-newer Plus-series models show compatibility warnings for non-Synology-branded drives in DSM. The NAS still functions with third-party NAS drives, but Synology-branded drives avoid the warning at a 15-30% price premium.
Best for: Buyers who want Synology's software polish and are prepared for the drive compatibility tradeoff
Check price on AmazonPros
- +Hybrid RAID allows gradual drive size upgrades
- +Mature, polished DSM software
- +Strong app ecosystem for backup and file sharing
- +Long track record of firmware support
Cons
- −Most expensive pick in this list before drives
- −Third-party drives trigger compatibility warnings on this generation
- −Synology-branded drives cost more than equivalent third-party drives
Synology DS423 4-Bay Diskless NAS
About this pick
The DS423 brings Synology's DSM software and 4-bay flexibility to a lower price point than the DS925+, aimed at family and small home office backup, file sharing, and basic video surveillance storage rather than heavy transcoding workloads.
As a value-series model, it predates the strictest 2024+ drive compatibility warnings, giving more third-party drive flexibility than the newer DS925+. Pair it with 4 NAS-grade drives for a complete, budget-conscious 4-bay setup.
Best for: Budget-conscious buyers who still want Synology's DSM software
Check price on AmazonPros
- +Lower cost than the DS925+ while keeping DSM software
- +More relaxed third-party drive compatibility
- +Good fit for family and small office backup
- +Compact footprint for a home office desk or shelf
Cons
- −Less CPU headroom than the Intel-based DXP4800 Plus
- −No SHR/hybrid RAID drive-size mixing on this model line
- −Diskless price still requires 4 drives on top
QNAP TR-004 4-Bay USB Type-C Direct Attached Storage (Diskless)
About this pick
It's worth being clear about what the TR-004 actually is: a direct-attached storage enclosure connected via USB-C to a single computer, not a network-attached NAS that multiple devices can access over Ethernet. If your home office is a single-user setup, this distinction may not matter much in practice.
Hardware RAID across 4 bays gives it real redundancy options despite the USB connection, and it's a genuinely cheaper way to get 4-bay RAID storage if you don't need multi-device network access. It can also serve as expansion storage attached to a QNAP NAS.
Best for: Single-computer setups that want 4-bay RAID without full NAS networking
Check price on AmazonPros
- +Lower cost than a full network NAS enclosure
- +Hardware RAID redundancy despite USB connection
- +Simple single-computer setup, no network configuration
- +Useful as expansion storage for an existing QNAP NAS
Cons
- −Not network-attached, only one computer connects at a time
- −No remote access or multi-user file sharing without a host NAS
- −Requires the host computer to be on for other devices to see it
TERRAMASTER D4-320 External Hard Drive Enclosure, 4-Bay USB 3.2 Gen2
About this pick
Similar to the QNAP TR-004, the D4-320 is a direct-attached enclosure, not a network NAS, connecting to a single computer over USB 3.2 Gen2 at up to 10Gbps. It's the cheapest 4-bay storage expansion option in this list.
Hot-swap bays make drive replacement straightforward, and plug-and-play setup means no NAS operating system to configure. For a home office that just needs a large, fast local storage pool attached to one workstation, this sidesteps NAS software complexity entirely.
Best for: Buyers who want the cheapest 4-bay storage expansion for one workstation
Check price on AmazonPros
- +Lowest price in this list
- +10Gbps USB connection, fast for a direct-attached unit
- +Hot-swap bays for easy drive maintenance
- +No NAS software setup required
Cons
- −Not network-attached storage
- −No RAID management software beyond basic modes
- −Requires the host computer to be powered on to access it
UGREEN NAS DXP2800 2-Bay, Ideal for Content Creators
About this pick
It's worth being upfront that the DXP2800 is a 2-bay NAS, not a 4-bay unit, included here for home offices who start researching 4-bay options but realize their actual capacity needs, and budget, fit a smaller 2-drive setup better.
If you don't need 4 bays of RAID 5 or RAID 10 flexibility and mainly want reliable 2-drive redundancy for a smaller content creation workflow, this UGREEN model gives you a lower entry cost than any 4-bay unit in this list while still supporting RAID 1 mirroring.
Best for: Buyers reconsidering whether they actually need 4 bays versus 2
Check price on AmazonPros
- +Lower total cost than any true 4-bay option in this list
- +Sufficient RAID 1 redundancy for smaller storage needs
- +Good starting point if 4 bays turns out to be more than you need
- +Compact footprint
Cons
- −Only 2 bays, no RAID 5 or RAID 10 flexibility
- −Less total capacity ceiling than the true 4-bay picks
- −Not a direct substitute if you specifically need 4-bay expansion room
UGREEN NAS DH2300 2-Bay Desktop NAS, Supports 64TB
About this pick
Like the DXP2800 above, the DH2300 is a 2-bay NAS, not a 4-bay unit, listed here as the most budget-friendly alternative for home offices whose storage needs turn out to be smaller than a 4-bay purchase justifies. It supports up to 64TB across its 2 bays with large enough drives.
It's a genuinely simple, low-cost entry into networked storage with basic RAID 1 support, well-suited to a first NAS for automatic backup rather than a growing multi-app home office server.
Best for: First-time NAS buyers deciding between 2-bay and 4-bay before committing
Check price on AmazonPros
- +Cheapest true networked NAS in this list
- +Supports large per-bay drive capacity up to 64TB total
- +Simple setup for basic backup use cases
- +Good stepping stone before committing to 4-bay costs
Cons
- −Only 2 bays, no RAID 5/10 option
- −Less capable CPU than the Intel-based 4-bay picks
- −Not suitable if you specifically need 4-bay expansion
Synology DS223 Home & Office Backup Hub (2-Bay Diskless NAS)
About this pick
The DS223 rounds out this list as another 2-bay Synology option, not a 4-bay unit, for home offices whose actual need is straightforward file backup and centralized storage rather than the RAID 5/10 flexibility a true 4-bay NAS provides.
Synology's DSM software makes setup approachable for less technical buyers, and 2-drive RAID 1 mirroring covers basic redundancy needs. If your research keeps leading back to 4 bays, use this as the cost baseline for what a much simpler 2-bay setup would cost instead.
Best for: Buyers who conclude a simple 2-bay backup NAS covers their actual needs
Check price on AmazonPros
- +Approachable DSM setup for less technical users
- +Reliable RAID 1 backup redundancy
- +Lower cost than any true 4-bay pick in this list
- +Includes surveillance app support
Cons
- −Only 2 bays, not a substitute for genuine 4-bay expansion needs
- −No hybrid RAID or RAID 5/10 options
- −Lower CPU capability than the Intel-based 4-bay picks
How We Evaluated These 4-Bay NAS for Home Offices
Each pick was assessed across 5 criteria weighted for real-world use.
RAID flexibility
Compared RAID 5, hybrid RAID (SHR), and RAID 10 support across models, since a true 4-bay NAS should offer more than the basic mirroring a 2-bay unit provides.
True total cost with drives
Weighed diskless enclosure price against the real cost of 4 NAS-grade drives, since the enclosure alone understates the actual investment.
Network-attached vs. direct-attached distinction
Verified whether each pick is genuine network-attached storage accessible by multiple devices, or direct-attached storage connected to a single computer via USB.
Processor capability
Compared Intel-based processors against lighter-duty chips for their ability to handle Docker, transcoding, and multitasking without becoming a bottleneck.
Drive compatibility policy
Checked whether each brand's 2024+ models show compatibility warnings for third-party drives, and what that means for real-world cost and setup friction.
How to Choose the Right 4-Bay NAS for Home Offices
By RAID Type You Actually Need
The right RAID level depends on whether you prioritize usable capacity, upgrade flexibility, or speed.
| Priority | RAID type | Best pick |
|---|---|---|
| General use, 1 drive failure protection | RAID 5 | UGREEN DXP4800 Plus |
| Mixing drive sizes, gradual upgrades | Hybrid RAID (SHR) | Synology DS925+ |
| Fastest read/write, Plex or heavy workloads | RAID 10 | UGREEN DXP4800 Plus |
| Simple mirroring only, smaller budget | RAID 1 (2-bay) | Synology DS223 or UGREEN DH2300 |
True Total Cost at Different Capacity Tiers
The enclosure price alone significantly understates what a 4-bay NAS actually costs once you add drives.
| Setup | Enclosure cost | 4 drives (approx.) | Estimated total |
|---|---|---|---|
| UGREEN DXP4800 Plus + 4x 8TB | $619.99 | ~$720 | ~$1,340 |
| Synology DS925+ + 4x 8TB (Synology-branded) | $700.00 | ~$900 | ~$1,600 |
| Synology DS423 + 4x 4TB | $399.99 | ~$400 | ~$800 |
| TERRAMASTER D4-320 (direct-attached) + 4x 8TB | $151.99 | ~$720 | ~$870 |
Cloud storage cost over several years can approach or exceed these totals depending on capacity, so weigh how much you value local speed and privacy against a subscription alternative.
Network NAS vs. Direct-Attached Storage
Need multi-device or remote access
Choose a true network-attached NAS like the UGREEN DXP4800 Plus, Synology DS925+, or DS423, all accessible over Ethernet from multiple devices.
Only need fast storage attached to one workstation
The QNAP TR-004 or TERRAMASTER D4-320 direct-attached enclosures are cheaper and skip NAS software entirely, but only work with one connected computer at a time.
Not sure you need 4 bays at all
The DXP2800, DH2300, and DS223 are 2-bay alternatives that cost meaningfully less if your real need is simple mirrored backup rather than RAID 5/10 flexibility.
RAID Rebuild Risk by Setup
Rebuild time and risk during that window vary by RAID type and drive size, which matters more than most buyers expect.
| RAID type | Typical rebuild time (8TB drives) | Risk during rebuild |
|---|---|---|
| RAID 5 | 12-48 hours | A second drive failure during rebuild causes total data loss |
| RAID 10 | Faster than RAID 5, less parity math | Lower risk window, but only 50% usable capacity |
| Hybrid RAID (SHR) | Similar to RAID 5, varies by drive mix | Same single-parity risk profile as RAID 5 |
| RAID 1 (2-bay) | Shorter due to fewer drives | Simpler recovery, but no expansion beyond 2 drives |
Frequently Asked Questions
Do I actually need a 4-bay NAS, or would 2 bays be enough?
If your real need is simple mirrored backup or a smaller content library, a 2-bay NAS like the Synology DS223 or UGREEN DH2300 costs meaningfully less than any true 4-bay setup, enclosure and drives included. Reserve a 4-bay purchase for when you specifically need RAID 5 or RAID 10 flexibility, or capacity beyond what 2 drives can reasonably provide.
What's the real total cost of a 4-bay NAS, not just the enclosure price?
A diskless 4-bay enclosure around $600-700 plus 4 NAS-grade 8TB drives at roughly $180 each brings the total to $1,320 or more. Always factor in drive cost separately, since diskless enclosure pricing alone significantly understates the full investment.
What's the difference between the QNAP TR-004/TERRAMASTER D4-320 and the network NAS picks in this list?
The QNAP TR-004 and TERRAMASTER D4-320 are direct-attached storage enclosures connected via USB to a single computer, not network-attached storage. A true NAS like the UGREEN DXP4800 Plus or Synology models connects over Ethernet and can be accessed by multiple devices on the network, even remotely, while a direct-attached enclosure requires its host computer to stay powered on.
Should I choose RAID 5, hybrid RAID, or RAID 10 for a 4-bay NAS?
RAID 5 gives about 75% usable capacity with 1-drive failure protection and is the most common general-use recommendation. Hybrid RAID (SHR) lets you mix drive sizes and expand gradually, useful if you plan to upgrade drives one at a time. RAID 10 gives only 50% usable capacity but the fastest read/write speeds, best for Plex or other heavy read workloads.
Why do newer Synology models show compatibility warnings for third-party drives?
Synology's 2024-and-newer Plus-series models, including the DS925+, flag non-Synology-branded drives with compatibility warnings in DSM. The NAS still functions with third-party NAS-grade drives, but Synology-branded drives avoid the warning at a 15-30% price premium. Factor this into your total cost if drive brand flexibility matters to you.
How risky is a RAID rebuild after a drive failure in a 4-bay NAS?
A 4-bay RAID 5 array with 8TB drives typically takes 12 to 48 hours to rebuild after a single drive failure. During that window, NAS performance degrades and a second drive failure would cause total data loss, which is why some buyers prefer RAID 10 or hybrid RAID for a less risky rebuild profile.
Bottom Line
best overall: UGREEN NAS DXP4800 Plus 4-Bay NAS, Intel Pentium Gold 8505 - best overall pick in this roundup.
See the full rankings above for all picks with pros, cons, and best-for summaries.
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