To schedule removal of old backup files that are create as a result of the Backup database job while retaining only specific number of files in Advanced Authentication server volume, perform the following:
Click Backup/Restore > Schedule Backup.
Set the configurations to schedule the back up export in Backup schedule.
Set the cron expression for the schedule in the first column.
Select Remove old *.cpt files from the drop down to remove old cpt files from the Advanced Authentication data volume.
Specify the number of old backup files that must be retained in Keep last.
For example, to remove the old backup files but retain the latest fifteen backup files in your server volume, set Keep last to 15.
Click Save.