Exascend EX256GSDU1 Catalyst UHS-I SDXC Memory Card - 256GBDesigned to excel in professional photography and high end cinematography, the 256GB Catalyst UHS I SDXC Memory Card from Exascend lets you keep up with extreme resolutions and rapid fire shutter bursts. This card features a storage capacity of 256GB and utilizes the UHS I bus to deliver maximum sequential read speeds of 180 MB s and maximum sequential write speeds of 150 MB s. Thanks to its V30 speed class rating, minimum write speeds are guaranteed