mm. I don't know the RA-95 but I guess it's old, so it might be that it does not support HD disks! Did you try a DD disk???
Keyboards/Sound Units: Kurzweil 2600S, Roland VR-760, Acces Virus C, Roland G-800, Akai AX60, Minimoog, Machine Drum, Roland R8-M, mediastation x-76