The SanDisk Extreme 128GB SD memory card delivers performance that lets you take control of your creativity. With shot speeds of up to 70MB/s* [128GB-256GB] and UHS Speed Class 3 (U3)(2) recording, youre ready to capture stunning high-resolution, stutter-free 4K UHD video(1). Its 150MB/s* [64GB-256GB] transfer speeds mean you can quickly move your photos where you want them. Plus, its built to withstand weather, water, shocks and other less-than-ideal conditions so you can rest assured that its good to go wherever you go.Shot speeds up to 70MB/s, transfer speeds up to 150MB/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. X = 150KB/secPerfect for shooting 4K UHD video(1) and sequential burst mode photography | (1)Full HD (1920×1080) and 4K UHD (3840 x 2160) video support may vary based upon host device, file attributes.