The Sandisk Extreme Pro 64GB SDXC UHS-1 memory card provides read speeds of up to 200MB/s and sequential write speeds up to 90MB/s, ideal for high-speed shooting with modern high-resolution cameras. This card’s U3 & V30 video speed ratings provide a 30MB/s sustained video capture rate, which will easily handle HD and is suitable for 4K recording with most cameras (check your manual to be sure).