Western Digital WD Purple WDD256G1P0A 256 GB microSDXCStorage Capacity: 256 GB Maximum Read Speed: 100 MB s Maximum Write Speed: 60 MB s Speed Class Rating: Class 10 UHS III (U3) Width: 0. 4" The WD Purple microSD card is borne out of extensive analysis of four generations of industrial products to specifically address the surveillance market. With its high endurance and capacities up to 256GB, the WD Purple microSD card provides long lasting on camera storage, and its support for card health monitoring