$ 0 0 SymptomsYou set up full disk backup to external USB drive and rotate 2 disks.Go to Backup tab and create System Disk backup to 1st USB-disk.Change destination for created backup to 2nd USB-disk.Create New full slice of System Disk backup to 2nd USB-disk.Change destination for created backup to 1st USB-disk.Create New full slice of System Disk backup (new full slice) to 1st USB-disk.