The 256GB AV Pro MK2 UHS-II SDXC card is built for high bit-rate, high-resolution capture — Full HD, 4K and 3D video, plus raw and continuous burst photography in DSLR and drone systems. Its UHS-II bus sustains 260 MB/s read and 140 MB/s write, with a V60 Video Speed Class rating guaranteeing a minimum write speed of 60 MB/s.