C)hange: The "C" command will acquire a Library disk for downloading.
Since the Library disks are really private sub-directories it is possible
to have only one disk accessed at a time. When a disk is selected for
downloading, you will be informed of the current selected disk before you
change to a new one. If no change is desired, press the [ENTER] key to
cancel the change.

A Library disk must be selected using "C)hange" before they are available
for use. Once selected, you may archive the entire disk and download all
the files as a single archive file or you may download individual files on
the selected disk.
