The SanDisk Extreme PRO CFexpress Card Type B - 256GB is designed to deliver speeds necessary for working with smooth, raw 4K video captures at resolutions up to 4096 x 2160. The Sandisk 256GB Extreme PRO CFexpress Card Type B provides read speeds of up to 1700 MB/s and write speeds of up to 1400 MB/s, which enables low latency during high-speed recording and an enhanced workflow efficiency. This card is also backward compatible with select XQD cameras that adopt firmware to enable CFexpress. In the event of accidental file deletion, SanDisk's RescuePRO Deluxe data recover software is available as a free download. Please note to check with the manufacturer of your particular camera to ensure CFexpress compatibility.