The SanDisk Extreme Pro microSDXC card delivers high transfer speeds, so you can get to your videos faster than ever before. Use the USB 3.0 reader for convenient transfers and take the bottleneck out of enjoying even your massive 4K Ultra HD video files. Finally your memory card can keep up with you and your lifestyle! This card is ideal for offloading 4K Ultra HD video from your action camera, drone, high-performance camera or smartphone.