Super File Backup and Utilities v1.0 is a file copier that is ultra fast but requires a parallel data link from the floppy drive.  A good example of the hardware needed is the 21 Second backup hardware/software combo. Here is some additional information on the data cable needed.  There is also some good information about the 21 Second backup found in this Lemon64 thread.  If you refer a video, here is a Youtube video about building the special data cable.