# Business backups: the 3-2-1 rule and how to prove your backup works

> The 3-2-1 backup rule: keep three copies of your data, on two different media, with one off-site. Make backups automatic and encrypted, keep an immutable copy to protect against ransomware, and most importantly test restores periodically — an untested backup may not work when you need it.

Source: https://www.al-arjan.com/en/blog/data-backup · العربية: https://www.al-arjan.com/ar/blog/data-backup.md

Author: [AUTHOR_NAME] — 2026-09-26

## The most common mistakes

- Backups on a disk in the same room as the server
- Manual backups that get forgotten
- Never testing a restore
- An always-connected copy that gets encrypted with the data in a ransomware attack
- Not knowing who holds the passwords and storage accounts

## A simple plan that suits most companies

- Automatic daily database backups
- A fast local copy for quick restores
- An encrypted off-site cloud copy
- Weekly and monthly retention points
- A monthly or quarterly restore test with documented results

## Frequently asked questions

### How often should we back up?

As often as you can afford to lose: if a day’s work is unacceptable to lose, back up more than daily.

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