Large Capacity -- Carry 40,000+ high-quality photoes or 7,500+ average videos Vivid Mixcolor -- Make it easier to classify your files. More colors, more choices. Plug and Play -- Compatible with Windows / Linux / Mac OS. Needs no drive to be installed. High Speed Transmission -- Reading speed 25 MB/s; Writing speed 12 MB/s. Transfer 1000 photos in less than 5 min. If you have any problems with your order, feel free to contact us for solutions.