Speed clever, we could only extract a max video browse velocity of 223MB/s and 198MB/s produce fee from our UHS-II SD card - not dreadful, but a way shot of Various other readers we've tested. Image transfer overall performance is even worse still, with 152MB/s read and 98MB/s compose speeds https://supertop-shop.com/usb-3-0-sd-and-micro-smart-card-reader/