The SanDisk Extreme PRO SDHC/SDXC UHS-II Memory Card is designed for professional photographers and videographers that require some serious performance. The new Extreme Pro line is certainly specced to satisfy these needs(and then some), with SanDisk boldly claiming that they are the world’s fastest SD cards available on the market. If the quoted performance numbers of 280MB/s read and 250MB/s write(maximum) are any indication, it will definitely rival any SD cards that are currently out there.
The new Extreme Pro line is optimized for top-end cameras that support the new UHS-II standard and also has a UHS Speed Class 3 Rating, which is the highest available that supports 4K, Full HD, and 3D video recording. SanDisk’s cards are quoted to at a minimum sustained write speed of 30MB/s in these conditions