The 256GB SanDisk Extreme PRO® SDXC card is perfect for capturing all of the action as it happens. Powered by SanDisk QuickFlow™ technology, SanDisk's Extreme PRO UHS-I memory card yet saves you time and hassle, letting you transfer movies, high-def pictures and other large files with a read speed of 200MB/second. The SanDisk Extreme PRO SD card is perfect for capturing 4K UHD video.