Securedigital sd sdxc card memory size 64 gb read speed 45 mbs write speed 10 mbs bus interface uhs i file formats fat32 exfat operating voltage 27 36 v suitable for full hd recording device class macbook dslr digital camera camcorder computer printer functions write protection switch manufacturers warranty lifelong standard sd 301 sdhc class 10 uhs speed class u1 protective properties waterproof temperature resistant shockproof x ray