“...write-protect tab.”
Pray tell, what is that?
The old-fashioned way to keep your floppy from catching a virus. :-)
I found “how to install w-p tab” and “how to remove w-p tab” on Google.
A physical indicator on a floppy disk that could change it from “read-write” access to “read-only” access. On a 5 1/4” floppy, it was a notch cut into the side of the disk in a specific location, while the 3 1/5” floppies usually had a built in toggle switch in the corner that allowed you to change modes back and forth.
VHS and audio cassettes had similar mechanisms too, two little tabs on the back of the cassettes that you could remove to stop them from being recorded over again.