I bought it to use on a Full HD 50p camcorder (Panasonic W850), having a bit rate of 28MB / sec in AVCHD, and 50 MB / sec in MP4 / Despite to the fact thatthis camcorder is UHS-I, this memory card secure a constant writing speed of minimum 30 MB / sec. I tested it in many ways, on the camcorder and on the computer, and it never dropped below 30 MB / sec. Be aware at the on-board card readers. My laptop Could not write on this memory card at a higher speed than 16 MB / sec. A good quality external CAD readed is required (I have Kingmax Which is much faster than the on-board one)). Hope to see soon more devices built for UHS-II. I fully recommend this memory card.
