NAS vs Cloud Backup for Small Business: Which Is Better?

"Should we get a NAS, or just back up to the cloud?" — probably the most common backup question we get from Townsville small business owners. The honest answer is that they do different jobs, and most businesses we manage end up using both. Here's how to think about it without the marketing fog.

The Two Things Backup Has to Survive

A real backup strategy needs to survive two very different events:

• Day-to-day problems — staff member deletes a file, a hard drive dies, a laptop gets dropped, you need yesterday's version of a quote. You want this restored fast — minutes, not hours.
• Disaster-level events — fire, flood, theft, cyclone, ransomware. The office burns down or every device in it gets encrypted simultaneously. You need a copy somewhere else.

A NAS is brilliant at the first thing. Cloud backup is essential for the second. That's the whole answer in one sentence.

What a NAS Actually Does

A NAS (Network Attached Storage) is a small box with 2–8 hard drives that sits in your office and acts as central storage and a backup target. The two big brands are Synology (our usual pick) and QNAP. A small business NAS:

• Backs up every PC in the office automatically each night
• Stores a snapshot history so you can restore "the file as it was last Tuesday"
• Provides shared folders (like an old file server, but easier)
• Hosts a private cloud (Synology Drive) for remote access without going through a third party
• Backs itself up to a second NAS or to cloud

NAS pros

• Fast restores. Recovering 200 GB from a NAS over gigabit Ethernet takes 30 minutes. From cloud over a typical Townsville NBN, the same restore is 4–6 hours.
• No ongoing subscription. Pay once, runs for 5+ years.
• Privacy. Your data stays on your premises.
• Doubles as file server and shared storage. Multi-purpose.

NAS cons

• Same-site risk. If the office burns or floods, the NAS is gone with everything else.
• Ransomware can hit it. If the NAS has writable shares mapped to PCs, ransomware on a PC can encrypt the NAS too. Mitigated with snapshots and proper config.
• Theft risk. Small box, valuable, on a desk somewhere.
• Upfront cost. $1,500–$4,000 to set up properly.
• Needs maintenance. Drives fail every 4–6 years on average. Someone has to notice and replace them.

What Cloud Backup Actually Does

Cloud backup (Backblaze, Wasabi, Azure Backup, Datto, Veeam Cloud Connect, M365 backup tools) copies your data to a data centre somewhere else — typically in Australia or Asia-Pacific. Done right, it's a true off-site copy that ransomware and a building fire both can't reach.

Cloud pros

• Geographic redundancy. Cyclone Yasi-grade event in Townsville? Your data's safe in Sydney or Singapore.
• Immutability options. Backups can be made write-once-read-many, so even if ransomware gets your admin credentials it can't delete the backups.
• Predictable cost, no upfront. $50–$300/month for typical small business depending on data volume.
• No hardware to maintain. The provider handles drives, redundancy, the lot.
• Scales easily. Need more space next month? Tick a box.

Cloud cons

• Restore speed is bottlenecked by your internet. A 1 TB restore over Townsville NBN takes 2–4 days. Worth knowing before you need it.
• Ongoing subscription forever. Cancel and the data goes (unless you've kept a local copy).
• Egress fees on some providers. AWS, Azure and some others charge to download your data. Read the fine print.
• You're trusting a third party with the keys. Use a provider with proper encryption you control.

The 3-2-1 Rule — Why You Want Both

The industry-standard rule of thumb, used by every serious IT shop: 3 copies of your data, on 2 different media types, with 1 copy off-site. See our detailed 3-2-1 backup rule article for the deep dive.

Translated for a typical Townsville small business:

• Copy 1: Live data on the staff PCs and Microsoft 365 (SharePoint, OneDrive).
• Copy 2: Local NAS backing up everything nightly with snapshots.
• Copy 3: Cloud backup of the NAS, plus separate cloud backup of 365 mailboxes and SharePoint.

NAS gives you fast restores for day-to-day stuff. Cloud gives you disaster survivability. Together they cover both scenarios.

Cloud-Only? When That Works

For very small businesses (1–3 people, mostly working out of Microsoft 365 already, with under 500 GB of data), cloud-only can be a reasonable choice. You're skipping the NAS upfront cost and accepting slower restores. We use this model for our smallest clients — typically:

• Microsoft 365 with third-party backup (Datto or similar)
• Endpoint backup (Datto, Backblaze) on each PC for local files
• Total cost ~$50/user/month

Restores are slower than NAS, but for a 3-person consulting firm where "I deleted my proposal" means restoring a 50 MB file, that's fine.

NAS-Only? When That's a Bad Idea

NAS without any off-site backup is the single most dangerous backup setup we see, because it feels like a backup but isn't really one. We've personally cleaned up after multiple businesses lost their NAS in an office fire or theft and learned they had no other copy.

If you've got a NAS now and no cloud backup of it — sort that out this week. It's about $50/month for a 2 TB cloud copy. Easiest insurance you'll ever buy.

What We Typically Recommend

Sole trader / 1–2 person business

Microsoft 365 Business Standard + Datto SaaS backup of M365 + Backblaze on each laptop. ~$60/user/month all in. No NAS needed.

Small business (3–10 staff, office-based)

Synology 4-bay NAS (~$2,000 with drives) for shared files and PC backup + cloud backup of NAS to Wasabi or Backblaze B2 + M365 with separate third-party backup. Upfront ~$3,000, ongoing ~$80/user/month.

Larger SMB (10–30 staff)

Server or larger NAS + cloud backup + immutable off-site copy + M365 backup + documented disaster recovery plan. This is where our managed IT services bundle the lot.

Special cases

• Trades businesses — usually mostly mobile, M365-centric. Cloud-only often fits.
• Medical / dental clinics — practice software runs on a local server; NAS-plus-cloud is essential. See our medical IT support page.
• Accounting firms — workpapers, client data, retention obligations. NAS for fast access, immutable cloud for retention. Our accounting firm IT page covers this.
• Anyone with CAD, video, or large media files — NAS pretty much mandatory. Cloud-only is too slow.

Security Considerations (Both Options)

For either NAS or cloud — get these right:

• Immutable / snapshot-based backups so ransomware can't delete or encrypt them. Synology supports this; most reputable cloud providers do too.
• MFA on the backup admin login — see our MFA explainer.
• Separate credentials from your day-to-day domain accounts.
• Encrypted backups with keys you hold, not just the provider.
• Regular test restores — quarterly minimum. Untested backup isn't backup.

See our ransomware protection guide for the bigger picture.

Frequently Asked Questions

What about external hard drives?

Fine as one part of a backup strategy, but not a complete one. They fail, they get lost, they don't rotate themselves. We use external drives only as a secondary local copy on top of NAS+cloud, never as the only backup.

Doesn't Microsoft 365 already back up my email and SharePoint?

No, not in the sense you'd want. Microsoft keeps 30 days of deleted items. They explicitly recommend you use a third-party backup. See our M365 security checklist.

Can a NAS replace our server?

For most small businesses, yes — Synology and QNAP NAS run file shares, Active Directory replacements, and a remarkable amount of business-class software. We do this often for clients moving off old Windows Server boxes.

Australian cloud or overseas?

Backblaze, Wasabi and Microsoft all have AU or Singapore regions. For most businesses Singapore is fine; for some industries (legal, medical, government-contract) Australian data sovereignty is a requirement. We'd ask your accountant or legal advisor if it matters for your industry.

What's the worst-case restore time?

From NAS: minutes to a few hours. From cloud over typical Townsville NBN: 1 hour per 100 GB roughly. For multi-TB restores, most cloud providers will ship you a hard drive — adds 3–5 days but bypasses your internet.