The SanDisk Extreme Pro microSDXC UHS-I card, with a storage capacity of 400GB, model number SDSQXCD-400G-GN6MA, is designed for professional content creators who need vast storage for their high-resolution photos, videos, and applications. It provides top-tier performance with U3 and V30 speed class ratings for flawless 4K UHD video capture, and an A2 rating for superior app performance on mobile devices. Users can expect fast transfer speeds up to 200MB/s read and 140MB/s write, streamlining the workflow. Created by WD/SanDisk Retail, this microSD card is engineered to withstand extreme conditions, including water, shock, x-rays, and extreme temperatures, ensuring reliability and durability for extreme sports enthusiasts and outdoor photographers.