Best External Drives and NAS for Small Business Backup (2026)
The simple hardware-plus-cloud setup I’d use to make sure a small business never loses its files
Disclosure: some links in this article are affiliate links. If you buy through them, I may earn a commission at no extra cost to you. I only recommend gear I’d be comfortable using myself.
In my last article, I said backup is the one layer that saves you when everything else fails. This time, let’s get practical: what should a small business actually buy?
After more than 10 years working on enterprise backup and disaster recovery, the most common mistake I see is simple: people think one copy is a backup. A shared folder, a single USB drive in a drawer, or files “in the cloud” because they sync to OneDrive. One copy can be deleted, encrypted by ransomware, or lost with a stolen laptop.
A real backup follows the 3–2–1 rule: three copies of your data, on two different types of storage, with one copy off-site. For a small business, that usually means three building blocks:
- An external SSD, for fast local copies of laptops
- A NAS (a small storage box on your office network), for central storage and automatic backups
- Cloud backup, for the off-site copy that survives fire, theft, and ransomware
You don’t always need all three. Here’s what each one does, what I’d buy, and which combination fits your team size.
Option 1: An external SSD, the quick local copy
An external SSD is the simplest backup you can buy. Plug it into a laptop, run Windows File History or macOS Time Machine, and you have a fast local copy you can restore from in minutes.
Why SSD instead of an old-style spinning hard drive? SSDs have no moving parts, so they survive being dropped in a laptop bag far better, and they’re much faster.
What I’d buy:
- Samsung T7 Shield: my default pick. It’s rugged and water- and dust-resistant (IP65), with a long track record. Perfect for people who carry a drive around.
- Samsung T9: the faster option, roughly twice the speed of the T7 Shield on computers with a fast USB port. Worth it if you back up large files like video or design work.
Both support password protection with hardware encryption. Turn it on. An unencrypted backup drive that gets lost is a data breach.
The catch: an external drive only works if someone remembers to plug it in. And if it stays plugged in all the time, ransomware can encrypt it along with everything else. Treat it as a convenient extra copy, not your only backup.
Option 2: A NAS, the office backup hub
A NAS (network-attached storage) is a small box with hard drives that sits on your office network. Everyone’s computers back up to it automatically, and it can hold shared files too. For a team of 5–10 people, this is where backups stop depending on people remembering.
What I’d buy:
- Synology DS225+: a 2-bay NAS launched in 2025 and aimed at small teams. Synology’s software (DSM) is the easiest I’ve seen for non-specialists, and it includes free backup tools for Windows and Mac computers.
- Two NAS hard drives, such as WD Red Plus or Seagate IronWolf. Buy two of the same size and set them up as a mirror (RAID 1), so if one drive dies, the other keeps working.
A note on drives: in 2025 Synology briefly required its own branded drives in new models, but it reversed that with DSM 7.3. Standard third-party NAS hard drives work again in Plus models like the DS225+; they just show as “unverified” in the storage manager. Check Synology’s compatibility list before you buy.
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Important: RAID is not a backup. A mirror protects you from a dead drive, not from deleted files, ransomware, fire, or theft. That’s why you still need Option 3.
Option 3: Cloud backup, the off-site copy
Everything in your office can be lost at once: a fire, a flood, a break-in, or ransomware that spreads to every device on the network. Your off-site copy is what you rebuild from.
For small teams I like IDrive. One account can back up multiple computers and phones, it keeps previous versions of files so you can roll back to before a ransomware attack, and it’s priced for small businesses. Check the current plans to see which fits your number of devices and storage.
Note: cloud sync (OneDrive, Dropbox, Google Drive) is not the same as cloud backup. Sync copies mistakes and deletions instantly. Backup keeps history you can go back to.
What I’d set up, by team size
1–3 people (or a home office):
- Cloud backup on every computer
- One encrypted external SSD per person for a quick local copy
- No NAS needed yet
4–10 people:
- A 2-bay NAS with two mirrored drives as the office backup hub
- Every computer backs up to the NAS automatically
- The NAS, or each computer, also backs up to the cloud
- An external SSD for anyone who travels with important files
Either way, you end up with three copies, on two kinds of storage, with one off-site: the 3–2–1 rule.
Mistakes to avoid
- Leaving the external drive plugged in all the time. Ransomware can reach it. Plug in, back up, unplug.
- Treating RAID or sync as backup. Neither protects you from deletion or ransomware.
- Skipping encryption. Turn on the drive’s password protection and the NAS’s encryption options.
- Never testing a restore. Once a quarter, restore a random file from each backup. If you can’t restore it, you don’t have a backup.
- Forgetting the NAS itself. Keep its software updated, use a strong admin password with MFA, and don’t expose it directly to the internet.
Final thoughts
You don’t need enterprise gear to protect a small business. An encrypted external SSD, a simple 2-bay NAS for the office, and a cloud backup service cover nearly every disaster, from a dropped laptop to ransomware to a fire.
If you only do one thing this week: set up cloud backup on every computer. Then add local copies as your team grows.
Have a question about backing up your business? Leave a comment and I’ll do my best to answer.
Disclosure: some links in this article are affiliate links. If you buy through them, I may earn a commission at no extra cost to you.
