The 3-2-1 backup rule is a foundational data protection strategy recommending that you keep at least three total copies of your data (1 primary + 2 backups), stored on two different types of media (e.g., hard drive + tape), with one copy stored offsite. This strategy protects against hardware failure, theft, and natural disasters.
3 copies, 2 formats, 1 big problem: Why modern backups fail @howtogeek
Stop pretending your Google Drive is a backup strategy
3-2-1 Rule (or 3-2-1 Backup Strategy)
- The idea that a minimal backup solution should involve three copies of the data (one primary copy and two backup copies), where two different media types are involved in storing the copies, and one of the copies is stored offsite in a remote location.
