Eddie, that's a good reason to have a back up of your floppy disks. Be aware also that not all floppys are created equal. I've noticed that those that I've purchased at Staples, ie., "there own brand", are inferior in quality. One disk became unusable in my PSR 2000 but thankfully it functioned okay in my computer so I was able to copy the contents on my Hard Drive and then transfer them to another floppy disk. Some of them make "noise" when inserted in my Keyboard. The noise is hard to describe (like a churning sound) and it can be annoying. I will definitely be purchasing a different brand next time around. Sony, Imation, and IBM are some of the better brand disks. I learned my lesson. As the old adage goes: Penny wise and Pound foolish. In other words I won't try and scrimp again on something that as you found out could be a make or brake situation all on account of a defective floppy disk.

Best regards,
Mike