B(ackup #4          Make a backup copy of the Off-Load system disk in drive 4.
C(opy #5            Copy the user disk in drive #5.
N(ew #5             Create a formatted empty user disk in drive #5.
T(idy disks         Tidy up the disks in both drives to collect together
                    all unused space.
Q(uit               Return to Off-Load command level.

