A portion of the OS is predefined as to be write-protected.

either use a floppy disk that is not write-protected or disable the write-protect feature.

A mobile terminal and a method of writing protection for a memory card.

Folder Protection – Help you to prohibit the changing of files by others.

Terminal Write-protect switch Label (front) You can prevent files from being deleted by using the write-protect switch on an SD, SDHC, SDXC, or UHS-1 card.

If there is a write-protection device in the memory card

If there is a write-protection device in the memory card

write-protected — Files or media that cannot be changed.

How to Remove Write Protection From USB Pendrive (5 Ways)

In order to format your SD card, you have to remove write protection.

How do I Remove the Write Protection on a Flash Drive...

Enjoy your mini SD card without that annoying write protection

You can additionally make them write protected to avoid accidental over writing.

A write protection device (10) prevents data from being written to selected portions of the hard disc of a computer.

The special file protect feature (104) may be implemented with a tab (188) that slides to set writeable or read-only modes.