Floppy diskettes for the PianoDisc PDS-128Plus need to be the really
old single side, single density (720 KB) diskettes; the 1.44 MB ones
won't work.

I bought an old software package (IBM Office Systems) on eBay that
came on the needed diskettes and just erased them. I think there were
fifteen 720 KB diskettes in the package.

The PianoDisc files are in a proprietary software format. Giebler
Enterprises used to market a conversion program; it didn't run on
anything newer than Windows 98. It allowed you to convert files back
and forth. [ https://www.giebler.com/ ]

Skip Klosz

 [ If people are in need of 720K floppies, I have more than a lifetime
 [ supply of new 720K floppies.  Contact me if you need some.  --Jody