The 3-2-1 Backup Method refers to the “3-2-1 Rule” when backing up information from your computer. This is how security professionals recommend you backup your data:
- 3 copies of our data should be kept (one primary, two backups)
- The files are saved on 2 types of media
- 1 copy is stored off-site (this can be online)
It may seem excessive to store three copies of data, but it is very plausible that hardware or software fails you, leaving your data and information lost in the cyberspace.