SanDisk 512GB Extreme PRO CFexpress Card Type B.
 
Designed to deliver speeds necessary for working with smooth, raw 4K video captures at resolutions up to 4096 x 2160, the 512GB Extreme PRO CFexpress Card Type B from SanDisk 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