With DSLRs, it has become very easy to fill your SD or memory card to capacity. Many of us have will have found ourselves deleting pictures when we run out of space. Doing this in the middle of a photo shoot is fine. However, if you are taking a bunch of pictures off a memory card, remember to reformat the card. This wipes the card clean and will remove all picture and camera data. Simply erasing your pictures can leave data on the card and can make it more likely corruption may happen. For this reason when you take pictures off your camera you should always reformat your memory cards to reduce the risk of data corruption occurring. You will find the reformat memory card command in the the setup menu on most digital cameras.