Write-protecting DiskettesYou can write-protect a diskette to prevent its data from being altered. When a diskette is write-protected, you can read it and copy data from it, but you cannot store new data on it or delete any files it contains. If you try to change data stored on a write- protected diskette, MS-DOS displays an error message.
To write-protect a 51/4-inch diskette, cover the small, rectangular notch (shown below) with an adhesive write-protect tab. Write-protect tabs usually are included in a new package of blank 5 1/4-inch diskettes.
To remove the write protection, peel off the write-protect tab.