The SanDisk Ultra microSD UHS-I card gives you the freedom to store and access your photos, videos, files and more. It’s tested and certified to work seamlessly with Chromebooks, giving you peace of mind right from the start. With capacities up to 256GB*, you’ll have room for hours of Full HD video(2) and transfer speeds of up to 120MB/s** help you move your content fast. | *1GB=1,000,000,000 bytes. Actual user storage less. | **Up to 120MB/s read speed, engineered with proprietary technology to reach speeds beyond UHS-I 104MB/s, requires compatible devices capable of reaching such speed. Write speeds lower. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. | (2)Full HD (1920x1080) video support may vary based upon host device, file attributes, and other factors. See official SanDisk website.