Capture more fast action and record more Full HD or 4K UHD video with your Android based smartphone, interchangeable-lens camera, drone or GoPro action camera. The Extreme microSD UHS-I Cards are built tough for extreme durability under challenging environmental conditions. Extreme speeds let you capture every detail of adventure and take the wait out of transferring your videos between devices. Extreme Speed. With extreme write speeds up to 100MB/s, memory cards give you the speed you need to capture every detail. Fast write speeds reduce the time you’re on hold while you move pictures and videos to your card, so you’re always ready to catch the next great shot, and enjoy smooth video playback. With UHS Speed Class 3 (U3) and UHS Video Speed Class 30 ratings, the Extreme microSDHC lets you capture uninterrupted 4K UHD and Full HD video. This makes it ideal for recording outdoor adventures, weekend trips, or sporting events without skipping frames. Load Apps Faster with A1. Rated A1, this Extreme microSD card is optimized for apps, delivering faster app launch and performance that provides a better smartphone experience.