what kind of Memory card is that SD/Micro SD? or what so ever, normally all MMC have lock option on it, try following these steps:
- take out the memory card look on the left hand side of it and it might
say in little letters lock and there's a little thing that moves up and
down and then move it up.
- The switch / notch works in same way as the notches on
compact audio cassettes and videotape cassette tapes or floppy disks. A
closed or covered notch is writable, while an open notch (or removed
tab) is protected.If the switch becomes broken or falls off
then the card will become a write-protected ROM card and no longer be
writable. A possible troubleshooting solution would be to apply tape
over the notched area (avoiding the connectors and the other notch) to
configure the card in a permanent writable state."
see attach picture for your reference