Designed for sports camcorders, tablets, smartphones, any other microSDXC-compatible devices, the 256GB High-Performance 633x UHS-I microSDXC Memory Card from Lexar can be used to record Full HD, 3D, and 4K video. This card has a capacity of 256GB, is compatible with the UHS-I bus, and features a speed class rating of U1, which provides minimum write speeds of 10 MB/s. In case your device does not support the UHS-I bus, this card also supports the Class 10 standard, which also features minimum write speeds of 10 MB/s. Lexar's 256GB UHS-I microSDXC Memory Card supports a maximum read speed of 95 MB/s, a maximum write speed of 20 MB/s, and is able to store up to 36 hours of video, 67,600 photos, or 58,100 songs. Included is an SD adapter, allowing this card to be used in card readers or devices that have an SD slot.