Professional photographers who require faster memory cards sturdier and more durable on the market should choose the SanDisk Extreme III SD card. Built to work in challenging conditions, with SanDisk Extreme III youll get more speed, better performance and reliability are unmatched. Thats because only SanDisk Extreme III memory cards feature innovative ESP technology for high speed and high performance. ESP stands for Enhanced Super-Parallel Processing. In simple terms, this means that you are getting the fastest read / write speeds available an amazing minimum 20MB per second ** sequential read and write speed speed you'll appreciate when you find yourself shooting and storing pic