This morning, SanDisk has announced what they are billing as the "world's fastest" 64GB microSDXC card. Designed for the latest generation of smartphones and tablets, the 64GB microSDXC card boasts speeds of 80MB/s read and 50MB/s write.
The card features UHS-1 and is a Class 10 card, so video recording and playback even at the highest bit rates should perform exceptionally well. SanDisk says that the card is even fast enough to handle super high bitrate 4K Ultra HD video. The card is waterproof along with the usual compliments of being x-ray proof, shock proof, and can handle temperature extremes from -25 Celsius all the way to 85 Celsius.