This DSLR Memory Card SanDisk Extreme 64GB 100mbps microSDXC Memory Card from SanDisk features a maximum read speed of 100 MB/s along with a maximum write speed of up to 60 MB/s. This card has minimum transfer speeds of 10 MB/s. Such speeds enable smooth continuous burst shooting, Full HD video capture, and card-to-computer transfers. Additionally, the card is built to withstand up to 72 hr in 3.3? of salt or fresh water, and is also shockproof and immune to X-rays.