1)   Relative Rev Backup (RRB) 4.2 Take countless incremental snapshots of your files/folders/drives to the same backup media, retain several backup snapshots; schedule backup runs and outdated generation deletion. Restore any backup generation in a single restore session. 2)   Relative Rev Backup for Server 5.1 Relative Rev Backup creates an archive of incremental backup revisions, ready to swiftly restore any file or folder that had been lost or corrupted days or months ago. It keeps daily weekly and monthly versions, without multiplying the backup space.