Improve your workflow efficiency With SanDisk QuickFlow Technology⁹, this card optimizes performance for timesaving media offloads with quick read speeds up to 200MB/s⁸ (64GB - 1TB). Pair with the SanDisk Professional PRO-READER SD and microSD™ to achieve maximum speeds (sold separately). Write speeds of up to 140MB/S Capture fast-action photos or shoot 4K UHD video² with write speeds of up to 140MB/s.⁸ The SanDisk Extreme PRO microSDXC UHS-I Card lets you shoot more and faster. Great for capturing 4K UHD video Ideal for recording outdoor adventures, weekend trips, or sporting events without skipping frames. With up to 1TB¹, the SanDisk Extreme PRO microSD UHS-I card lets you capture uninterrupted 4K UHD² and Full HD video with its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings.⁴ Load apps faster with A2 Get faster app performance for an outstanding smartphone experience thanks to the SanDisk Extreme PRO microSD card’s A2⁵ Specification. Durable design for use in extreme environments SanDisk Extreme PRO microSDHC™ and microSDXC™ UHS-I Cards are shockproof, temperature-proof, waterproof, and X-ray-proof,³ so you can enjoy your adventures without worrying about the durability of your memory card.