Unlock a locked photo on nikon d3000
All SD cards I have ever seen can be locked with a little slide on the left side as you face the label. if the slide is up, the card is unlocked and can be used for taking pictures. If the slide is down, it is in the locked position, which prevents it from overwriting anything that is currently on the card. Before you unlock it you may want to verify that all pictures on the card (if any) have been saved because once you start using the card and overwriting its contents, the pictures are gone forever. If the card is empty, just unlock it, format it and start taking pictures
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