SanDisk Extreme microSD UHS-I Memory Card 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. 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. Great for Capturing 4K UHD Video Ideal for recording outdoor adventures, weekend trips, or sporting events without skipping frames. With up to 1TB, the SanDisk Extreme microSD UHS-I card lets you capture uninterrupted 4K UHD and Full HD video with its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings. Load Apps Faster with A2 Get faster app performance for an outstanding smartphone experience thanks to the SanDisk Extreme microSDXC card's A2 Specification [A1 for 32GB].