You also need to check if your 3.5 floppy drive is working well. Take your floppy to someone with an old computer who has a workable floppy and see if you can read the files on your disk. New floppies drives are fairly cheap. I got a bunch of new Panasonic drives from a company where I do custom panels for electronic components. I have a flash disk system on one of my ez traks and I transferred the files from the floppy to a solid state hard drive on the other ez trak. Solid state hard drives are cheap also.