Sony CFexpress Type A 640GB Memory Card with 800MB/s Read and 700MB/s Write speed – CEAG640T Up to 800MB/s read speed and 700MB/s write speed High-capacity 640GB for high resolution, high bitrate video Effective heat dissipation to support high bitrate data transfers TOUGH and durable impact, bending, dust and moisture resistant Humidity, X-ray, electrostatic charge, ultraviolet radiation, resistant