Fast reading and writing speeds for taking high-action photos and videos The extreme speed of this powerful microSD memory card ensures data is transferred quickly, apps run faster and high-quality videos can be recorded in 4K UHD. The card supports 4K UHD videos, full HD videos and high-resolution photos, making it ideal for Android smartphones, action cameras and drones. The super-fast SanDisk Extreme microSDXC memory card has a reading speed of up to 160 MB/s and a writing speed of up to 90 MB/s. It also features A2 specification, enabling greater application performance and improving the way your smartphone works. Transfer files faster Fast reading speeds allow you to transfer 1000 high-resolution photos or 30 minutes of 4K video footage (24 GB) in less than 3 minutes. Ideal for recording 4K UHD videos Film outdoor adventures, weekend trips or sporting events in the highest quality without skipping frames. With up to 400 GB, the SanDisk Extreme microSD UHS-I memory card lets you capture uninterrupted 4K UHD and Full HD videos with its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings.