Many cameras use SD media cards to save images. If you are having trouble deleting pictures from your SD card, it is likely that your SD card reading device is incompatible with your SD card or that your SD card is locked.
Card Is Locked
Check to see if your SD card is locked. If the slider on the left side of the card is in the “locked” position, you will not be able to delete photos. Move the slider away from the “locked” position to be able to delete the pictures.