Check out the message I posted a couple of months ago to see how I fixed this problem. The link is below.
http://www.pechorin.com/m/2003/08/09/C1301_Disk_Error_on_Sony_Mavica_FD71_Possible_Solutions-203215.html
Be sure to reformat one of your floppy disks (using your computer and floppy drive,) after you adjust the little metal tabs that are just inside the floppy disk opening on the camera--to make sure they are straight and not bent. If one of the tabs is bent a little, it can cause this error message on the camera. But my camera didn't start working again until after I reformatted a floppy disk on my computer and inserted it into the camera. Then the other floppy disks worked fine after that.
Hope this helps.
Deb
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