The Lexar 128GB SDXC Memory Card Platinum II Class 10 UHS-I is a Secure Digital Extended Capacity memory card with 128GB of data storage capacity. Its Class 10 speed rating means its minimum read and write speeds will be 10MB/s, but the Ultra High Speed Class 1 (UHS-I) rating gives the card a speed rating of 200x, for maximum read speeds of 30MB/s and maximum write speeds of 22MB/s. Capture high-resolution still photos and HD video to transfer to your computer later.