Securedigital sd sdxc card memory size 64 gb read speed 90 mbs write speed 45 mbs bus interface uhs i file format exfat operating voltage 27 36 v series verbatim pro suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class digital camera dslr camcorder computer printer macbook functions write protection switch manufacturers warranty lifelong standard sd 301 sdhc class 10 uhs speed class u