I have two questions about the floppy disk drive on PSR9000.

First, my PSR9000 can't read the styles disk that is shipped with the keyboard. 'Unformatted disk' error message. That
can't be right my PC can read the disk and list its contents.

Second, HD disks formatted on PSR9000 only have a capacity of 720K, and once formatted on PSR9000, they can't be
read by the PC. Why?

Any help much appreciated!

Ernest.