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I have an SD card that was fine until today. I was able to take pictures on the camera and it loaded fine on the computer.

Then, all of a sudden, the camera gives me a "Memory Card Locked" error. I check the side of the card, but it's in the unlocked position. I also try to insert it into multiple computers, but none of them recognize it. What can I do?

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SD cards, and generally any flash media in general, have a limited read and write cycle. If NONE of your computers recognize it all, and at least one them used to, the card probably just stopped working.

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