I am fairly ignorant when it comes to DOS so bare with me. I am trying to load a program that is DOS based. My internal A drive does not WORK so I PURCHASED an external floppy drive. The problem that I have is that the disk is programmed to read from an A drive and I don't seem to have any way to CHANGE that. Is there some way around this? Thanks!You would be better served with a replacement internal floppy rather than trying to force USB to work on a DOS system.I tried that, but was told that it is a problem with my mother board and that is quite a bit more costly.Is the external floppy drive recognized by your computer? In real DOS mode? Dos prompt under Windows? What versions of DOS/Windows are you using?Yes, DOS does recognize the program and starts to load it, but STOPS when it gets to the part where it says loading from A to C. It then tells me that there is no disk in drive A even though it read from the external floppy drive to GET the files. I use XP.Try using the subst command. For example, if your external drive is D: you use subst a: d: . The command is only good until you log off or shut down, so a simple batch file in the startup folder will reinstate the command.