FreeFileSync Backup Strategy: Sync, Versioning, Recovery
Build a Windows backup strategy around FreeFileSync without confusing synchronization with historical backup.
Quick answer
Define whether you need a current replica, older versions, offsite recovery, or a combination before choosing a synchronization mode.
What to check first
A mirror answers what the source looks like now; versioned backups answer what it looked like earlier.
Windows-specific factors
Keep an additional copy in a different failure domain when the data is important.
Safer troubleshooting workflow
Monitor version retention, destination capacity, and failed operations so history does not silently disappear.
How to verify the result
Restore samples on a schedule and document the recovery steps.
Frequently asked questions
Should I change sync mode to fix this?
Not until the underlying cause is identified. First verify paths, permissions, comparison results, and logs.
Is a successful sync the same as a verified backup?
No. Important data should be checked at the destination and periodically restored to a separate location.
Related: all FreeFileSync Windows guides