If you mean the memory card itself, then hold the card facing you and push the small grey plastic button on the left hand side of the card to the up position, that should unlock the memory card. It is not really a button but more like a slide type of button.
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If you mean the memory card itself, then hold the card facing you and push the small grey plastic button on the left hand side of the card to the up position, that should unlock the memory card. It is not really a button but more like a slide type of button.