Business Continuity · Singapore

Cloud backup vs local backup: what's actually safer?

An external hard drive feels like a backup. Whether it actually protects your business in a real emergency is a different question entirely.

Quick answer Local backups are fast to restore but vulnerable to the same fire, flood, theft or ransomware that could hit your office. Cloud backups are stored independently and survive a physical disaster — most businesses need both, not one or the other.

The real question isn't cloud vs local — it's "what disaster are we protecting against?"

A local backup (an external drive, a NAS device in the office) protects against accidentally deleting a file. It does almost nothing against a fire, flood, theft, or ransomware that encrypts everything connected to your network — including that same backup drive, if it's plugged in when the attack hits.

Side by side

Scenario	Local backup only	Cloud backup
Accidentally deleted a file	✓ Fast recovery	✓ Recoverable
Office fire or flood	— Likely lost too	✓ Safe, offsite
Laptop/drive stolen	— Gone with it	✓ Unaffected
Ransomware on the network	— Often encrypted too	✓ Isolated, often immutable

A simple rule worth knowing: 3-2-1

3 copies of your data
2 different types of storage
1 copy kept offsite (which is what cloud backup gives you automatically)

The question worth asking about your current backup: if your office was inaccessible tomorrow — fire, flood, break-in — would your backup still exist somewhere else? If the honest answer is "it's all in the building," that's the gap.

A backup that's never been tested isn't a backup you can count on

Whichever combination you choose, the same rule applies: a restore that's never been tested is unverified. See why "we have backups" isn't a full disaster recovery plan for what testing actually looks like in practice.

FAQ

Questions, answered

Is cloud backup more expensive than local backup?

It depends on data volume and provider, but the cost difference is usually small compared to the cost of losing data that only existed in one physical location.

Can ransomware affect cloud backups too?

A well-designed cloud backup is kept separate and often immutable (unchangeable for a set period) precisely to prevent ransomware that infects your live systems from also destroying the backup copy.

Do we need both cloud and local backup?

Many businesses benefit from both — local for fast, everyday recovery of a single file, cloud for protection against a disaster that takes out your physical location entirely.