Designed for sports camcorders, tablets, and smartphones, the 512GB High-Performance 633x UHS-I microSDXC Memory Card from Lexar features a storage capacity of 512GB and supports maximum read speeds of 100 MB/s and maximum write speeds of 70 MB/s. This card has also been designed with the V30 Video Speed Class rating, which guarantees minimum write speeds of at least 30 MB/s. All of this allows for users to immerse themselves in extreme sports videography and photography in 4K, Full HD, and 3D.