UHS-II Speed Class 3 Rated. With the SanDisk SDXC 256GB Extreme PRO 300MB/s R/W UHS-II V90’s Video Speed Class rating, write speeds are guaranteed not to drop below 90MB/s, allowing you capture uninterrupted, cinema-quality 8K, 4K, 3D, and Full HD video at a minimum sustained write speed of 90MB/s. It also enables improved continuous RAW shooters plenty of speed with minimum bottleneck.

Ultra-Fast Read/Write. When used with a UHS-II compatible camera, you’ll see read and write speeds up to 300MB/s. The memory card is backwards-compatible with SDXC supported cameras, but you won’t see any increase in speed.

Durable Construction. This memory card is IP68 water and dust resistant, tested to survive drops up to 19.8-feet, and has an operating temperature of -13° to 185°F. You can use it in the desert, in snow, or underwater. Even if your camera doesn’t survive, this card probably will.