Securedigital sd sdxc card memory size 64 gb read speed 45 mbs bus interface uhs i file format exfat operating voltage 27 36 v device class car radio macbook tv dslr digital camera camcorder computer printer labeling field functions write protection switch manufacturers warranty 10 years standard sd 30 sdhc class 10 dimensions 32mm x 24mm x 21mm weight 2 g