Gear up and play fiercely with the SanDisk Extreme microSD card, ideal for mobile gaming. With extreme speeds to help you level up and boost your play, you'll be virtually unstoppable. Equipped with ample storage to save your favorite games, you won't have to constantly delete your photos, videos or other apps to make space for new games. And, with A2 app performance(2), you can boot into your favorite games in a flash. Performance designed to keep up with your demanding AAA/3D/VR game graphics and your 4K UHD videos(3), the SanDisk Extreme microSD card for mobile gaming makes the perfect teammate. 1GB = 1,000,000,000 bytes. Actual user storage less. (1)For 64GB: Up to 160MB/s read speeds; up to 60MB/s write speeds. Engineered with proprietary technology to reach speeds beyond UHS-I 104MB/s, requires compatible devices capable of reaching such speeds. Based on internal testing; performance may be lower depending upon host device interface, usage conditions and other factors. 1MB=1,000,000 bytes. (2)For 64GB-256GB: A2 performance is 4000 read IOPS, 2000 write IOPS. Results may vary based on host device, app type and other factors. (3)Compatible device required. Full HD (1920x1080) and 4K UHD (3840 x 2160) support may vary based upon host device, file attributes and other factors. Visit the SanDisk Video Knowledge Base for more information. (4)30-year warranty in Germany and regions not recognizing lifetime. See official SanDisk website for warranty details in your region.