Sdxc card securedigital sd memory size 256 gb read speed 155 mbs write speed 275 mbs bus interface uhs ii mode of transmission uhs312 memory type mlc file format exfat series a data premier one suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class digital camera dslr camcorder printer macbook functions write protection switch standard sd 40 sdhc class 10 uhs speed class u3 video speed clas