Micro sd card micro sdxc card memory size 64 gb read speed 90 mbs write speed 80 mbs bus interface uhs i mode of transmission uhs104 file format exfat operating voltage 27 36 v series samsung pro suitable for 4k recording full hd recording 360 recording 3d recording sports photography device class digital camera dslr camcorder computer tablet pc mobile phone printer macbook manufacturers warranty 10 years standard sd 301 sdhc class 10