After your computer's files have been backed up, the original and subsequent versions persist in the archive until certain time intervals are met.
Default retention policy
- Every 15 minutes —any new data eligible for backup is sent to the CrashPlan backup server.
- For the last seven days (not including the present day) — one unique version from every past 15 minutes is retained.
- For the last 90 days (excluding the past week) — one unique file from every past day is retained.
- For the last year (minus the past 90 days) — one unique file from every week is retained.
- From previous years (but not including last year) — one unique version from the previous month is retained.
- Any files deleted on the source computer — will not be expunged from the CrashPlan server until manually executed on the client using the "compact archive" command.
Should you wish to change your computer's retention policy, use the CrashPlan reference guide for backup settings.
Periodically, the CrashPlan server grooms your archives to verify the integrity of your backups, purge deleted files, and reduce the number of versions according to your retention policy. During maintenance, backups are paused and restores are unavailable. Refer to the CrashPlan documentation describing archive maintenance to learn more.