Experience speeds on a totally new level, with read speeds of up to 1700 MB/s and write speeds of up to 1200 MB/s with the SanDisk 256GB Extreme PRO CFexpress Card Type B. Packed with plenty space to store smooth, raw 4k video footage and stills. General features include backward compatibility with select XQD cameras that adopt the firmware to enable CFexpress; and SanDisk RescuePRO Deluxe Data Recovery software included in case of an event of accidental file deletion.