This is a back up for the document you are editing, and the problem arises when you try to save the final version. The program deletes the old copy, and puts the current copy in its place. The disk cannot hold two copies of the same file at once, and the program forces the second copy of the document onto your disk. In the end it corrupts most of the information on the disk. Another worry deals with computer viruses.
Floppy disks can easily carry viruses between computers.
These viruses can lead to a devastating loss of data. Not only for disk but also for the computer itself. Lab TAs can scan your disk for viruses if you are concerned that one of your files might be infected. Although floppies are a convenience they are very delicate, and one way to ensure the safety of your files and documents is to use your Home Directory. If you still wish to use a floppy to carry data between your personal computer and the labs, simply save your document to your Home Directory, and then copy it your floppy when you have finished working on it.