I have a USB floppy drive for my Mac and I have no problems reading files off of old disks that I share with my old Macintosh computers. However, I cannot ever write to any of the disks. I have tried all formats I could in Disk Utility, and they all failed, or hung the application. After 15 minutes of no response, I force quit Disk Utility. Does anyone have any suggestions on how to write files to floppy disks in Mac OS X but still have the disk compatible with a Macintosh running an older version of the Mac OS?