SanDisk is touting its new SanDisk Extreme microSDXC memory cards as the "world's fastest" and promising they'll speed both image capture and transfer for smartphone, tablet and camera users.

SanDisk reports its microSDXC card read speed is as fast as 80MB/sec with write speed up to 50MB/sec. This should result in both faster file transfer times and improved capture performance, especially when using the multi-shot burst mode on your mobile device or recording HD video.

SanDisk's new line of Extreme microSDHC and microSDXC cards are now available worldwide in 16GB to 64GB capacities, priced from $59.99 to $199.99 USD. Learn more at