I have a 3.5 floppy disk that I can’t put any data on. The computer says it’s “write protected”. What does that mean?
3.5 floppies can be write protected by sliding a little tab on the back of the disk so it exposes a small hole in the upper right-hand corner of the disk.
If the hole is open, the disk can’t be written to. If the hole is closed, it can. Just slide the tab to your preference.
Note that some disks, especially the kind you get from a software company, may be read-only.