SanDisk 64GB Extreme PRO SDXC UHS-II Memory Card
For one of the fastest SD cards out there, this is a great option to consider. Designed for professional photographers and others in need of blistering fast read/write speeds, this card uses the UHS-II standard and U3 speed class to deliver incredible performance. It has read speeds up to 280MB/s, which is about three times faster than many other high-performance cards, and a maximum write speed of 250MB/s.
The 64GB model is the largest one available in this series, which is plenty of storage for many devices and uses, but could be an issue when capturing HD or 3D video. Smaller 32GB and 16GB models are available in the Extreme PRO line, but they are both SDHC cards although their speed and performance remains as good as this one.