Securedigital sd sdxc card memory size 64 gb read speed 13 mbs write speed 13 mbs file format exfat operating voltage 27 36 v series sandisk standard device class car radio macbook tv dslr digital camera camcorder computer printer labeling field functions write protection switch manufacturers warranty 5 years standard sd 20 sdhc class 4 adapter without adapter protective properties shockproof waterproof x ray resistant operating temp