On specific time intervals, an incremental backup of your data is made automatically as long as your backup drive is attached to your Device. Genie Timeline saves backups for the past 4 hours, hourly backups for the past 48 hours, daily backups for the past week, ;and weekly backups onwards, files created ;and then deleted before the next backup will not be included. When your backup drive becomes full, Genie Timeline will automatically delete old versions of files not showing on Timeline to free space.