SanDisk Extreme PRO SD UHS-I Memory Card - 512GB. Product Description. The SanDisk Extreme PRO 512GB UHS-I SD card offers top-tier capacity and speed in a durable form. It’s designed for creators needing ultra-high storage and uncompromised performance for extended 4K UHD shoots and large file storage. Product Features. Up to 200MB/s read speed for efficient file offloading. Up to 140MB/s write speed for smooth 4K UHD video capture. UHS Speed Class 3 (U3) and Video Speed Class 30 (V30). Waterproof, temperature-proof, shockproof, and X-ray-proof. Supports SanDisk QuickFlow™ technology (with compatible reader). Lifetime limited warranty. Product Specifications. Capacity. 512GB. Interface. UHS-I (SDXC). Max Read Speed. Up to 200MB/s. Max Write Speed. Up to 140MB/s. Speed Class. UHS-I, U3, V30. Operating Temperature. -13°F to 185°F (-25°C to 85°C). Form Factor. SD card (32mm x 24mm x 2.1mm). Weight. Approx. 0.07 lbs. Warranty. Lifetime limited.