andisk SDCFSP-064G-G46D (SDCFSP064GG46D) 64GB Extreme PRO CFast 2.0 Card with up to 515MB/s Write Speed. The SanDisk Extreme PRO CFast™ 2.0 memory card delivers the high performance the broadcast, cinema, and photography industries demand today. The card combines the speed, capacity and performance needed to record cinema-quality 4K video (4096x2160p).