Sometimes cheap readers claim a card is protected, regardless of switch setting. If the switch is fine then just try taking it out and cleaning the contacts.
I have the same problem, and despite the switch at the side of the SD card, it still says it's locked once I put it in my Canon powershot SD630. However, it works perfectly fine with my NikonD40
And it's equally amazing what answers some people will give.
My card is also locked. 99% of people who use memory cards know to use the little tab slider to un-protect their cards. That's a little piece of info that's been around since cassette tapes and video tapes, only back then you broke off the tabs. Floppy discs had slider tabs to protect them. Yes, I slid the tab both up and down and it didn't matter where the tab was, my 8 GIG card remains locked. I could add pictures to my card if I inserted the card into my memory reader in the computer. But once I put the card in my camera, it says "Memory Card Error. Card Locked!"
Going to the menu of my camera to unlock it doesn't work either. The screen 'greys out' the main menu where you protect the card so you can't unprotect it.
I am presently formatting the card (which I can't do on my camera, but am doing it through the card reader on the computer). Weird how it will allow me to reformat, yet I can't take a picture with it.
Sometimes cheap readers claim a card is protected, regardless of switch setting. If the switch is fine then just try taking it out and cleaning the contacts.
i had my memory card lock and i was about to kill the sucker! but thank god i had the light bulb go off and went online typed in my question and BAM this came up and saved my sanity thanks yall!
You can also get the memory card locked/protected message if you are trying to use a SDHC card in a camera that does not support High Capacity (HC). High Capacity is any SD card with over 2GB of memory space.