🚀 go-pugleaf

I believe you can reduce the number of disk swaps during copy to 3 if you
copy file F from B to A instead of from A to B.

Another hint:  When copying disk A to disk B by dragging the disk A icon 
               to the Disk B icon, dialog boxes which request that you swap
               disks appear before the copy operation commences.  Swapping
               disks at this point is unnecessary. Simply click on ok two 
               times and proceed with the copy.  Similarly, upon termination
               of the copy process two dialog boxes request two disk swaps.
               You can ignore these also.  If you haven't been doing this 
               already you will appreciate the time savings.