I have a Yamaha upright MX100A - floppy disk drive and all - that I bought recently and I am having trouble finding much documents about the disclavier side of things - I assumed it would be able to read files my piano teacher created on his C7 disclavier but when I put the floppy in I get a message that says the disk must be formated - similarly when I try to get my PC to open a MX100A formated disk I get the same message from my PC - it's like the piano uses a different format on disks - I bought a couple of Yamaha floppy disks and my MX can't read them. I can format disks on the yamaha and record and play back - so wondering if their are any diskclavier experts on this forum who could suggest help documents...thanks