Hi, the most efficient way is to get two storage devices running in the machine concurrently, although pkzip can create a multiple-disk spanning archive. Then ideally read that (or them) off on a more modern computer and store an image of the disk somewhere.
Are you sure the original machine can't be booted from a floppy disk to normal DOS?
Are you sure the original machine can't be booted from a floppy disk to normal DOS?