Securedigital sd sdxc card memory size 64 gb read speed 90 mbs write speed 80 mbs bus interface uhs i file format exfat operating voltage 27 36 v series samsung pro suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class macbook dslr digital camera printer camcorder manufacturers warranty 10 years sdhc class 10 uhs speed class u3 dimensions 32mm x 24mm x 21mm weight 2 g