Hi Bill,
the 2000 had a DD disk drive designed for 720kB floppies. It was quite possible to use HD disks by formatting them in the 2000, but they would be formatted as DD with the extra hole telling your pc they were HD disks. This is why you see unreadable rubbish on the pc.

If you have EMC try the System / Check Format command. I have not tried this for this particular problem, since I sorted this problem many years ago when I got the 3000. It might just work, though not designed exactly to solve this particular scenario. It is designed to reformat KN800/1000 disk drive disks which were not formatted in the latest versions of dos at the time.

If it does not work, just resave the files in the 6000. Editing in EMC will not be possible then though.