Securedigital sd sdxc card memory size 256 gb read speed 90 mbs write speed 60 mbs bus interface uhs i mode of transmission uhs104 file format exfat operating voltage 2 7 3 6 v series sandisk extreme suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class digital camera dslr camcorder computer printer macbook labeling field functions write protection switch software included rescuepro deluxe m