The 3-2-1 rule that saves your files before disaster does

Most people back up their photos and documents exactly once — usually to a single external drive or one cloud account — and quietly assume they're safe. They aren't. A drive can die, an account can get locked or hacked, and a single copy of anything is really just a countdown to loss. The fix is a decades-old rule that IT professionals swear by: the 3-2-1 backup rule.

Here's how it works. Keep 3 copies of any important file: the original plus two backups. Store them on 2 different types of media — for example, your laptop's internal drive and an external SSD — so a single hardware flaw can't wipe out everything. And keep 1 copy offsite, meaning somewhere physically separate, most easily a cloud service like Google Drive, iCloud, or Backblaze. That offsite copy is what survives a fire, flood, or theft that takes out your whole home.

The genius of the rule is redundancy without paranoia. Each failure mode — hardware death, account lockout, physical disaster — is covered by a different copy, so no single event can catch all three. You don't need expensive gear; a cheap USB drive plus one free cloud account already gets most people to 3-2-1.

The hack is to automate it so you never rely on remembering. Turn on automatic cloud sync and schedule your external drive to back up on its own, and your safety net rebuilds itself in the background.