The miniSD memory card offers all of the benefits of a standard SD card, but in a much smaller size. In fact, it is over 60% smaller than a full-sized SD card. The miniSD cards are used to store digital images, video, MP3 files and other data in mobile phones. The miniSD card includes an adapter that converts the miniSD card into a full size SD card to be used with the growing number of SD compatible devices available in the market.