I have a USB drive attached to my OMV server and would like to setup an rsync backup to it. I verified that the drive is mounted (I see UUID=2eb33726-c4b9-4433-838d-42d32562f5b4 /mnt/wd12tbusb auto defaults 0 0 in fstab) and that there is a file system, with dh -H, from an SSH session. When I select Shared Folders -> Add -> Device, the drive is not visible in the drop-down menu.
Am I missing a step here, or is something broken?