Your 730 should have no trouble reading a standard MIDI file. I have put songs onto a regular formated PC disk, and they read fine in my 730. When a 730 formats a disk, it adds two files that are suppossed to help with disk operations. You can format a disk in your PSR, (or format several) and then just copy the songs from your PC onto the disks, and they should play OK. No special software or drivers are needed to do this. Hope this helps,
Dave Waldman