Warm prompt: Dear customers, please carefully look at your camera model, some of the camera is not able to support so large capacity memory stick, you can choose to 8 or 16 g. This is the conclusion we draw from our customer feedback. We guarantee that every memory stick has been tested by staff at the time of issue. Please be assured. Approximate 30MB/s in reading and approximate 20MB/s in writing speed. Transfer speed is about 6 times faster than the Memory Stick(R) PRO Duo. Speed varies upon the measurement conditions Memory Stick PRO-HG Duo HX is ideal for high-speed data transfer aor continuous shooting You can take up to 180 large JPEG photos per minutes.