Best NAS for Small Business in 2026

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A network attached storage (NAS) device is the single most useful piece of hardware most small businesses have never bought. For roughly the cost of one new laptop, a NAS gives your team a shared file server, an on-premises backup target, a way to sync files across offices, and (with the right model) a private cloud you actually control. Here are the best NAS units for a small business in 2026, plus what to look for and what to avoid.

The quick picks

For most 2-to-25-person businesses, the Synology DS224+ is the sweet-spot pick — 2 drive bays, a real operating system (DSM) that is genuinely easy to run, and every feature you actually need for file sharing, backup, and remote access. If you have 15-50 people and want room to grow, step up to the Synology DS923+ (4 bays, more RAM, more headroom for virtualization and heavier backup jobs). If price is the primary factor, the QNAP TS-233 is a workable 2-bay entry point. And for a budget-conscious buyer who is comfortable with a slightly less polished OS, TerraMaster’s F2-424 gives you serious hardware for less money.

What a NAS actually does for a small business

A NAS is a small server that lives on your office network and stores files that anyone on the team can reach. Unlike a shared folder on someone’s laptop, the NAS is always on, always accessible, and holds every drive in a redundant array so a single drive failure does not lose your data. What you can do with one:

• Shared file storage — the “S: drive” for the whole company, without a $10,000 Windows server.
• On-site backup target — back up every laptop and workstation nightly to the NAS, then ship an off-site copy to a cloud service like Backblaze or IDrive.
• Time Machine target for Macs; Windows File History or Veeam target for PCs.
• Private cloud — the vendor’s mobile app lets your team reach files from anywhere without paying per-user for Dropbox.
• Camera / surveillance recorder for a handful of IP cameras (Synology Surveillance Station is included).
• Email archive, SQL backup, virtualization host on the higher-tier models.

What to look for

• Number of drive bays. Two bays is the minimum (so you can run RAID 1 and survive one drive failure). Four bays gives you real capacity and better RAID options (RAID 5 / SHR-1) plus room to expand.
• CPU and RAM. A good rule for a small business: at least a quad-core Intel or ARM chip and 4 GB of RAM. If you plan to run backups, virtualization, or Docker containers, get 8 GB or more (and make sure it is upgradeable).
• Drive support. Most small businesses want NAS-rated hard drives (Western Digital Red Plus, Seagate IronWolf) in the 4-8 TB range. Avoid using desktop drives; they are not built for 24/7 duty.
• Operating system. This is where NAS units really differ. Synology’s DSM is the gold standard — polished, well-documented, and easy for a non-IT owner to run. QNAP’s QTS is more powerful but a lot more cluttered. TerraMaster’s TOS has come a long way but is still the roughest of the three.
• Backup software. Synology includes Active Backup for Business (free, backs up unlimited Windows/Mac endpoints, VMs, and Microsoft 365) — a real value-add over the competition.
• Warranty. Three years is standard; five is worth the small premium if the vendor offers it.

The units compared

Synology DS224+

The most sensible NAS you can buy for a small business in 2026. Two drive bays, Intel Celeron J4125 CPU, 2 GB RAM (upgradeable to 6 GB), two 1 GbE network ports for link aggregation, and DSM 7 as the operating system. Populate it with two 4 TB or 8 TB NAS drives in SHR (Synology’s flexible RAID mode) and you have a fault-tolerant file server plus a backup target for the whole office. Check current price on Amazon.

Synology DS923+

The four-bay big brother. AMD Ryzen R1600 CPU, 4 GB ECC RAM (upgradeable to 32 GB), NVMe cache slots, and an option to add a 10 GbE card. Best pick for a 15-50 person business, a heavy backup workload, or anyone who wants to run a virtual machine or two on the NAS itself. Check current price on Amazon.

QNAP TS-233

QNAP’s answer to the DS224+ at a lower entry price. Two bays, an ARM CPU, 2 GB RAM. Fine for basic file sharing and light backup, but skip it if you plan to run a lot of QNAP’s optional apps — the CPU is not built for it. The QTS operating system is competent but the interface is dense; expect a learning curve.

TerraMaster F2-424 (and the 4-bay F4-424)

The value pick. TerraMaster shipped a serious refresh in 2024 that put current Intel N-series CPUs and 8 GB of DDR5 RAM into a NAS that undercuts Synology by 25-30%. If you are comfortable with a slightly less-refined operating system and want more hardware for the money, the F2-424 or F4-424 is the play.

How to size the drives

Two rules of thumb:

1. Total useful capacity should be 3-5 times your current active file storage. If your team currently uses 500 GB of shared files, plan on 1.5-2.5 TB of useful capacity so you have room to grow, snapshot, and back up.
2. Buy NAS-rated drives, always. A 4 TB Western Digital Red Plus or Seagate IronWolf drive costs $30-40 more than a consumer drive and lasts three to five times as long in 24/7 use.

Two 8 TB NAS drives in RAID 1 give you 8 TB of useful capacity and can survive one drive failure. Four 8 TB drives in RAID 5 / SHR-1 give you 24 TB of useful capacity and can survive one drive failure. Add a hot spare bay if the model supports it.

Setup basics

On day one, do these five things:

1. Set a strong admin password and rename the default admin account.
2. Enable HTTPS on the web interface and turn off the default HTTP port.
3. Enable two-factor authentication for every user account.
4. Turn on automatic security updates and email alerts for drive health.
5. Set up the off-site copy — the NAS is not a backup by itself, it is one leg of the 3-2-1 backup rule. Pair it with a cloud backup target so you have three copies of your data, on two different media types, with one off-site.

For the security side (firewall rules, VPN access, closing down remote-desktop exposure), pair the operations setup here with a real security review to close the loop.

The bottom line

A $500-$1,000 NAS with a pair of $150-$200 NAS-rated drives replaces a shared folder on someone’s PC, gives you a real backup target, and adds a private cloud your team can reach from anywhere. For most small businesses, the Synology DS224+ is the right first purchase; move up to the DS923+ if you need more bays or headroom. Then pair it with a cloud backup service and you have a genuine, small-business-grade data-protection setup for well under $2,000 all-in. See our guide to small business backup solutions for how the NAS fits into the broader backup plan.