A backup is a recoverable copy
A backup is useful only if it contains the needed data, remains available after the original is lost and can actually be restored. Synchronization alone may copy accidental deletion or corruption to every device.
Use more than one copy
A practical approach keeps working data plus at least one separate backup. For especially important files, use two backup destinations with one kept offline or otherwise protected from the same account and device failure.
What to include
- Documents and photos that cannot be replaced
- Password-manager recovery materials
- Device configuration or application data where needed
- Business or tax records subject to retention needs
- A list of important accounts and recovery contacts—without plain-text passwords
Protect the backup
Encrypt portable drives, secure cloud accounts with MFA and limit who can delete or overwrite backups. A permanently connected drive can be affected by malware or ransomware along with the computer.
Test restoration
Open sample files and occasionally perform a real restore to a temporary location. Testing reveals missing folders, forgotten encryption keys and account-recovery problems before an emergency.
Define recovery priorities
Identify what must be restored first: primary email, password manager, work files, photos or device settings. A written order reduces confusion during an incident.
Practical takeaway
Keep separate copies, protect backup access and test restoration. A green “backup complete” indicator is not the same as a proven recovery.
Cloud sync versus backup
Synchronization keeps files consistent across devices, which is convenient but can also propagate deletion, corruption or ransomware-encrypted files. A backup keeps versions or a separate copy that can be restored after the working set changes. Some cloud services provide both, but the retention settings and restore process should be confirmed.
Keep the instructions recoverable
Write down where backups are stored, how they are encrypted and which account controls them. Someone restoring data should not need the failed device to obtain the only decryption key or login code. Review this documentation without including passwords in plain text.
Version history and retention
Backups that keep several versions can recover an earlier clean copy after accidental edits or ransomware. Check how long deleted files and previous versions are retained. A thirty-day history may be insufficient when a problem remains unnoticed for months.
Recovery drills
A small annual drill can restore a folder, confirm account access and verify that encryption keys are available. For a household, include the person who would need to help during an emergency. For a business, document responsibilities, recovery order and acceptable downtime.