Best NAS Systems for Small Business in 2026: 7 Picks

The best NAS for a small business in 2026 is the Synology DS925+ for offices of roughly 2 to 20 people that value mature software and backup tooling, the Synology DS1525+ when you need a fifth bay and a path to 10GbE, and the UGREEN DXP4800 Plus when you want faster hardware for less money and can accept younger software. For larger teams or heavy file work, step up to the Asustor Lockerstor 4 Gen3 or the UGREEN DXP8800 Plus.

A business NAS is judged differently from a home one. It has to centralize files, back up every laptop and server, survive a disk failure without downtime, resist ransomware, and be supportable by whoever happens to be the office IT person. This guide compares seven real models on those terms, then walks through the sizing, backup, and recovery-time math that should drive the purchase.

Our top picks

Top pickSynology DS225+ Private Cloud Media Server

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Also greatSynology DS425+ Private Cloud Media Server

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Also greatSynology DS1525+ Video Editing & Production Server

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Quick comparison of small business NAS picks

Specifications come from vendor pages and published reviews. Retail listings sometimes differ on memory ceilings and maximum capacity, so confirm details for the exact SKU you plan to order.

What small businesses should require from a NAS

1. Redundancy: at least two-drive protection (SHR-2, RAID 6) for anything that would stop work if lost, or single parity with a tested separate backup.
2. Snapshots: immutable or versioned snapshots so ransomware or an accidental delete can be rolled back.
3. Backup tooling: agent-based backup of Windows and Mac machines, and ideally of Microsoft 365 or Google Workspace data.
4. Directory and permission support: user groups, folder permissions, and optionally Active Directory or LDAP integration.
5. Offsite replication: a way to copy data to a second NAS or cloud target automatically.
6. ECC memory: a desirable extra that protects against silent memory errors on a machine that never reboots.
7. Support horizon: a vendor with a record of long software updates and responsive support.

Best overall: Synology DS925+

The DS925+ is a four-bay NAS with an AMD Ryzen V1500B (four cores, eight threads), 4 GB of ECC DDR4 memory expandable to 32 GB, two 2.5GbE ports, two M.2 NVMe slots, and support for a DX525 expansion unit. Its strength is DSM, Synology’s operating system, which bundles Active Backup for Business to protect PCs, servers, virtual machines, and Microsoft 365 or Google Workspace accounts at no extra license cost per device, Synology Drive for file sync, snapshot replication, and Hyper Backup for offsite copies.

It also integrates with Active Directory, so permissions follow your existing user accounts. For an office without dedicated IT, that integrated tooling is usually worth more than raw hardware speed. Synology reversed its 2025 drive restrictions in October 2025, so third-party NAS drives are supported again.

Trade-offs: an older CPU platform with no integrated graphics, 2.5GbE only, and a higher price than UGREEN or TerraMaster for equivalent hardware.

Best for growth: Synology DS1525+

The DS1525+ adds a fifth bay to the same Ryzen V1500B platform and ships with 8 GB of ECC memory, expandable to 32 GB. Synology positions it for growing teams: it supports two DX525 expansion units for up to 15 bays total, a maximum single volume of 200 TB with sufficient memory, and an optional 10GbE module sold separately. Reviewers measured sustained throughput of about 1,180 MB/s with the 10GbE option in place, which is enough for many simultaneous users.

Five bays suit a layout of four data drives plus one for protection, and SHR makes it easy to mix drive sizes as you upgrade over time. Third-party drives are supported.

Trade-offs: the platform dates from 2018, 10GbE costs extra, and the unit is priced above the QNAP and UGREEN competition.

Best entry-level: Synology DS425+

If your needs are a shared drive for a handful of staff and a backup target for a few computers, the DS425+ is enough. It uses an Intel Celeron J4125 with 2 GB of memory (expandable to 6 GB), four SATA bays, two M.2 slots, one 2.5GbE port, and one 1GbE port. It draws less power than the Ryzen models, and it runs the full DSM software suite.

Trade-offs: no expansion unit support, no ECC memory, and the 2 GB of memory is thin for Active Backup plus virtualization. Plan to upgrade the memory right away and treat this as a small-team box.

Best hardware flexibility: QNAP TS-464

The TS-464 uses an Intel Celeron N5105 or N5095 (QNAP lists both) with 8 GB of DDR4 memory expandable to 16 GB, four SATA bays, two M.2 slots, two 2.5GbE ports, and a PCIe Gen3 x2 slot for a 10GbE card or additional storage. QNAP’s QTS software includes Virtualization Station and Container Station, so a small business can run a Windows virtual machine or a handful of containers on the same box. A reviewer at a 25-person firm reported sustained transfers around 560 MB/s with link aggregation.

Trade-offs: QTS has a steeper learning curve, and QNAP’s security track record has required careful patching, so keep it updated and off the open internet.

Best performance per dollar: UGREEN NASync DXP4800 Plus

UGREEN’s DXP4800 Plus delivers an Intel Pentium Gold 8505 (five cores, six threads), 8 GB of DDR5 memory expandable to 64 GB, four SATA bays, two M.2 PCIe 4.0 slots, a 10GbE port, a 2.5GbE port, and HDMI 2.0b. Few NAS units in this class include built-in 10GbE, and the faster CPU keeps file indexing, snapshots, and Docker apps responsive.

UGREEN’s UGOS covers file sharing, snapshots, and backup tasks, but the ecosystem is smaller than Synology’s, and the warranty is two years. For a technically comfortable owner who wants speed on a budget, it is attractive. A business that needs Microsoft 365 backup and Active Directory polish should lean to Synology.

Trade-offs: younger software and a shorter warranty.

Best for fast shared storage: Asustor Lockerstor 4 Gen3

The AS6804T pairs an AMD Ryzen V3C14 quad-core with 16 GB of ECC DDR5 memory (expandable to 64 GB), four SATA bays, four M.2 PCIe 4.0 slots, two 10GbE ports, two 5GbE ports, two USB4 ports, and a PCIe 4.0 x4 slot. It suits a design or video team that works from shared projects: four NVMe drives form a fast pool for active work, and the hard drives hold the archive.

Trade-offs: it costs the most of the four-bay options, and ADM software is less business-focused than DSM.

Best for larger teams: UGREEN NASync DXP8800 Plus

With eight SATA bays, an Intel Core i5-1235U (ten cores, twelve threads), 8 GB of DDR5 memory (up to 64 GB), two M.2 slots, a PCIe x4 slot, two 10GbE ports, and two Thunderbolt 4 ports, the DXP8800 Plus gives a 20 to 50 person office room to grow. Two-drive protection across eight bays keeps about 75 percent of raw capacity, and the Thunderbolt connections let a workstation attach directly for fast transfers.

Trade-offs: it draws more power, makes more noise, and carries the same young-software caveat as other UGREEN models. Reviewers cite differing maximum capacity figures, so check the spec sheet.

Decision matrix by business size and need

Sizing a business NAS with real numbers

Storage capacity

Start with what you hold today. Suppose a ten-person firm has 3 TB of shared project files, 10 laptops with 500 GB each of data to back up, and wants 30 days of versions. A deduplicated backup of ten laptops typically occupies about 1.5 to 2 times the live data, so roughly 8 to 10 TB. Add 3 TB of files with snapshots at 30 percent overhead, about 4 TB. That totals around 14 TB. With 30 percent growth, plan for roughly 18 TB usable.

With four bays and two-drive protection, usable space equals half the raw capacity, so four 12 TB drives give 24 TB usable. That fits the plan with headroom.

Recovery time and recovery point

Two numbers define your risk. The recovery point objective is how much work you can afford to lose; nightly backups mean up to a day, hourly snapshots reduce that to an hour. The recovery time objective is how long you can be without files. Restoring 4 TB over a 1GbE link at about 110 MB/s takes roughly 10 hours, while over 2.5GbE at about 280 MB/s it takes about 4 hours, and over 10GbE with fast storage, about 1.5 hours. If a day of downtime would be costly, a faster network and a second replicated NAS are worth the money.

A backup plan that actually survives problems

1. Primary data on the NAS, protected by RAID and hourly snapshots.
2. Nightly backup from the NAS to an external drive or second NAS in a different room.
3. Encrypted offsite copy through cloud storage or a second site, run at least weekly.
4. Quarterly restore test: pull back a folder and a full machine image to confirm the backups work.

RAID protects against disk failure. It does not protect against deletion, ransomware, theft, fire, or a failed controller, so treat it as one layer. Enable immutable snapshots where the software supports them, use two-factor authentication on administrator accounts, and avoid exposing the NAS management port to the internet.

The first week: a deployment checklist

1. Install drives, update the NAS operating system, and set the clock and time zone so snapshot and backup schedules run when you expect.
2. Create the storage pool with two-drive protection, then a volume, and run a long SMART test on every disk before loading data.
3. Join the NAS to your directory service if you have one, or create groups such as Staff, Finance, and Admin instead of assigning permissions to individuals.
4. Build the shared folder structure and permissions from the business side first: who must read, who must write, who must never see a folder.
5. Enable snapshots on every shared folder and set a retention policy, for example hourly for two days, daily for a month, and monthly for a year.
6. Deploy backup agents to laptops and servers, and run the first full backup overnight while the network is quiet.
7. Configure email or push alerts for disk health, volume status, and failed backup jobs, and send them to a mailbox several people read.

Total cost of ownership beyond the sticker price

The enclosure is usually less than half the cost over five years. Drives are the largest expense, followed by a UPS, a second device or cloud plan for offsite copies, and the time of whoever manages it. Four 12 TB drives cost more than many of the enclosures in this guide, so a cheaper NAS with weaker software can end up costing more once you add the hours spent working around its limits.

Electricity matters less than most people expect. A four-bay NAS with spinning drives typically draws roughly 25 to 45 watts under access and far less when drives hibernate, which works out to a couple of hundred kilowatt-hours a year. Software licensing is the other hidden item. Synology includes its backup suite at no per-device charge, while some competing ecosystems charge for advanced features or cloud connectors, so read the license terms before assuming a feature is free.

Vendor support and update record

For a business, the length of the software support window can matter more than benchmark speed. Synology and QNAP have long track records of shipping security fixes for years after a model launches, and both publish end-of-support dates. Asustor and TerraMaster also maintain active update streams. UGREEN entered the market recently, so its long-term record is shorter, which is a reasonable thing to weigh if the NAS will hold client data for ten years.

Warranty terms differ as well: Synology’s desktop models carry three years, while UGREEN lists two. Check the repair process, including whether you pay shipping, and consider keeping a spare drive and a documented recovery procedure so a hardware fault does not become a crisis.

Security hardening in practice

Change the default administrator account name, disable the guest account, and require two-factor authentication for every administrator. Put the NAS on a separate network segment from guest Wi-Fi and from internet-of-things devices. If staff need remote access, use a VPN or the vendor’s relay service with strict access controls instead of forwarding ports from the router. Review the access log monthly, and disable services such as FTP and Telnet that you do not use.

Ownership realities

• Budget for a UPS; a NAS shut down abruptly during a write can corrupt volumes.
• Plan for drive replacement every four to five years, and keep one cold spare.
• Install software updates promptly; NAS devices are common ransomware targets when left unpatched.
• Check the vendor’s drive compatibility list and use CMR NAS drives, not desktop models.
• Document the setup: admin credentials in a password manager, the RAID layout, and the restore procedure, so the business does not depend on one person’s memory.

Frequently Asked Questions

How many bays does a small business NAS need?

Four bays suit most offices of up to about 20 people, giving a useful balance of capacity and protection. Choose five or eight bays if you expect data to double within a few years or want to avoid a migration.

Is Synology still the best NAS for business?

For software maturity, backup tools, and long support histories, it remains the usual recommendation. QNAP, Asustor, and UGREEN win on hardware per dollar, so the choice depends on whether you value polish or performance.

Do I need ECC memory?

It is helpful for a device that runs continuously and holds important data, since it guards against silent memory errors. It is not mandatory for small offices, but it is a reasonable tie-breaker.

Can a NAS replace a file server?

For file sharing, user permissions, and backup, yes. Many also run lightweight virtual machines and containers. Applications that require a specific Windows Server role still need a real server.

RAID 5 or RAID 6 for a business?

Use two-drive protection for business-critical data, particularly with large drives, because rebuilds can take a day or more and a second failure during that time would lose the array. Single parity is acceptable only with a tested, separate backup.

How should I protect a NAS from ransomware?

Keep software current, disable remote access you do not need, use strong unique passwords with two-factor authentication, enable immutable snapshots, and keep an offline or offsite copy that malware on the network cannot reach.