Sandisk 64GB Extreme 150MBPS UHS-I SDXC Memory CardProduct Description: 64GB Storage Capacity UHS I V30 U3 Class 10 Max Read Speed: 150 MB s Max Write Speed: 60 MB s Min Write Speed: 30 MB s Records Full HD, 3D, and 4K Video Built In Write Protect Switch Designed for SD devices that can capture Full HD, 3D, and 4K video, as well as raw and burst photography, the 64GB Extreme UHS I SDXC Memory Card from SanDisk has a capacity of 64GB, is compatible with the UHS I bus, and features a speed class rating