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What Is the 3-2-1 Backup Rule?

Use multiple copies so one hardware failure, theft, or ransomware incident does not destroy important files.

Quick Answer

Keep three copies of important data, on two different types/locations of storage, with at least one copy kept separately/off-site.

Step by Step

  1. Use the official settings or website for the account, device, browser, or service involved.
  2. Keep three copies of important data, on two different types/locations of storage, with at least one copy kept separately/off-site.
  3. Review security and recovery settings after making the change.
  4. Keep recovery information and backups somewhere you can access if the primary device is lost.

If That Doesn't Work

  • Never give an unsolicited caller or message sender your password, recovery code, or one-time verification code.
  • If money or a critical account is at risk, use a known official contact method rather than contact information supplied in the suspicious message.