Securedigital sd sdxc card memory size 64 gb read speed 280 mbs write speed 250 mbs bus interface uhs ii file format exfat operating voltage 27 36 v series sandisk extreme pro suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class digital camera dslr camcorder computer tablet pc tv printer macbook labeling field functions write protection switch ecc manufacturers warranty 30 years standard