Get extreme speeds for fast transfer, app performance, and 4K UHD. Ideal for your Android smartphone, action cameras or drones, this high-performance microSD card does 4K UHD video recording, Full HD video, and high-resolution photos. The super-fast SanDisk Extreme PRO microSDXC memory card reads up to 170 MB/s and writes up to 90 MB/s. Plus, it's A2-rated, so you can get fast application performance for an exceptional smartphone experience.