ok...now i have successfully copied a file between two disks, from one s50 disk i made, to a blank disk. but when i try to write from the c drive to a disk, it writes, but when i load the disk into the s50, it says please enter s50 disk. i unzipped to the same folder/directory sdisk is in. should i use an unformatted disk to write on, or one formatted for the s50? or am i downloading bum files? and...does anyone have the roland library online?