The SanDisk Extreme microSDXC memory card lets you save time transferring media with read speeds of up to 190MB/s powered by SanDisk QuickFlow Technology (64GB - 1TB). Pair with the SanDisk Professional PRO-READER SD and microSD to achieve maximum speeds (sold separately). With write speeds up to 130MB/s, it s ideal for your Android smartphone, action cameras, or drones. This high-performance microSD card handles 4K UHD video recording, Full HD video, and high-resolution photos. Plus, it s A2-rated, so you can get fast application performance for an exceptional smartphone experience.