Securedigital sd sdxc card memory size 64 gb read speed 90 mbs write speed 50 mbs bus interface uhs i memory type mlc file format exfat operating voltage 27 36 v series patriot ep suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class digital camera dslr camcorder computer car radio tv printer macbook functions write protection switch standard sd 30 sdhc class 10 dimensions 32mm x 24mm