Designed for those who want to capture Ultra HD 4K and Full HD video, as well as raw and JPEG stills and bursts 256GB Superior UHS-I microSDXC Memory from Silicon Power keeps up with the pace of your life. Built with a storage capacity of up to 256GB, this card features a maximum read speed of 100 MB/s, a maximum write speed of 80 MB/s, and a thanks to its V30 / U3 rating, write speeds are guaranteed not to drop below 30 MB/s. If your device does not support V30 / U3, there is backward compatibility for Class 10 / U1 devices.