Set up server backup, using two 2TB Seagate ext USB portable drives. I've been thru the process with both drives to add the drive to the backup. The drives are swapped each day. When one drive is removed and the other connected I can see the drive in Disk Management but the backup does not see it, I get a message on the dashboard that there's a drive available for backup but in Hard Drives it's not listed. I have to go thru the backup setup again. Is there a missing step here? Do we need to eject the drive first? I've not had to do this at other sites.