Backup vs Archive: Most Businesses Confuse the Two

Ask most IT managers what they have in place for data protection and they will point to their backup solution. But probe deeper — can you restore data from three years ago? Can you retrieve a specific email from 18 months back for a legal dispute? — and the gaps quickly become apparent.

What Backup Is For

A backup is a point-in-time copy of data that exists for the purpose of recovery. If your server fails, your files get corrupted, or ransomware encrypts your data, a backup lets you restore operations. Backups are typically short-to-medium term — most organisations keep daily backups for 30 to 90 days, with weekly and monthly snapshots extending a little further.

The critical characteristic of a backup is speed of recovery. A backup is useless if it takes three days to restore from it.

What Archive Is For

An archive is a long-term, immutable copy of data that exists for compliance, legal, and regulatory purposes. Archives are not designed for rapid recovery — they are designed for retention, searchability, and legal defensibility. Email archiving, for example, is required by many regulated industries and is essential for responding to litigation and regulatory enquiries.

• Backups are for operational recovery; archives are for compliance and legal retention.
• Backups can be overwritten; archives should be immutable.
• Backups are measured in hours to restore; archives are measured in years to retain.

The 3-2-1 Rule Still Applies

For backups, the 3-2-1 rule remains the baseline: keep three copies of your data, on two different media types, with one copy stored off-site. Cloud backup solutions have made the off-site component much simpler to achieve — but the rule only protects you if your backups are regularly tested. A backup you have never restored from is a backup you cannot rely on.