Offering both strength and speed, the CFexpress Type A TOUGH Memory Card from Sony provides fast read speeds up to 800 MB/s along with write speeds up to 700 MB/s. This quick performance benefits recording a variety of video resolutions, bit-rates, and compressions, as well as high-resolution continuous raw photo shooting. PCIe 3.0 Bus Max Read Speed: 800 MB/s Max Write Speed: 700 MB/s