Though TrilioVault supports forever incremental backups, organizations only need to keep a certain number of backups at a given time, determined either by the backup count or by the date of the backups. Any older backups that exceed the count or the expiration date should be deleted to conserve backup storage. Since TrilioVault supports forever incrementals, it cannot delete all last backups. It will break the backup chain and more recent backups becomes unusable. TrilioVault creates and manages full synthetic backups, where TrilioVault merges all backups that were marked for deletion into one full backup and retains the full backup. All other backups are deleted from the backup media. This way TrilioVault continues to take incremental backups, but still maintains the list of backups according to user retention needs.