The Memory Stick PRO format was designed to realize continuous real-time recording of high capacity high-resolution moving images. In addition to its theoretical maximum transfer speed of 160Mbps, a main advantage of the Memory Stick PRO format is its minimum write speed of 15Mbps as a format standard, which will enable continuous real-time recording of high-resolution moving images. Furthermore, the minimum write speed of 15Mbps will make it possible to design more reliable moving image recording devices capable of preventing data loss in the event of sudden power loss or accidental removal of the media during file recording.