Blazing-Fast Speeds That Deliver Raw 4K Video When you’re shooting where the action is, the CFexpress® Card Type B unleashes the RAW performance of your gear. With read speeds up to 1700MB/s and write speeds up to 1200MB/s, you’ll get low latency during high-speed recording and an enhanced workflow efficiency that’s far beyond anything existing SanDisk cards deliver. This card enables smooth, RAW 4K video capture with sustainable performance. Backward-compatible with select XQD® cameras that adopt firmware enabling CFexpress®, the card includes both RescuePRO® Deluxe Recovery Software and a limited lifetime warranty for added peace of mind.