Backing Up Your Business Data: the 3-2-1 Rule Explained
A simple framework for making sure your backups will actually be there when you need them.
The 3-2-1 backup rule is a simple, well-established framework: keep at least three copies of your data, on two different types of media, with one copy stored offsite. It sounds basic, but it protects against far more failure scenarios than a single backup drive sitting next to the server it's backing up.
The "two different media" part matters because a single type of storage can fail in a way that affects every copy at once — a bad batch of hard drives, for instance. And the offsite copy protects against fire, theft, or a ransomware infection that spreads to anything connected to your local network.
Just as important as having backups is testing them. A backup you've never tried to restore from is an assumption, not a safety net — schedule periodic test restores so you find out backups work before an actual emergency, not during one.
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