No one likes waiting for a file transfer to finish, and thankfully SanDisk is doing something about it. The company's new "Extreme" line of microSD cards (16GB, 32GB, 64GB capacities) promises to deliver speeds of up to 80Mbps. Benchmarks done by Android Police have the 64GB card hitting 78Mbps when used in a dedicated card reader. Putting the card in a smartphone, however, yields far different results. Most smartphones, save for the Exynos 5 Octa version of the GS4, don't support the
