I bought a new Samsung Galaxy Note 3 (AT&T) - N900A. I also just bought a " SanDisk Extreme 64 GB microSDXC Class 10 UHS-I Memory Card with Adapter (SDSDQX-064G-U46A) " Speed Performance: Up to 80/50MB/s read/write speed Please give me a advice about " should I play or run all apps on (internal memory of note 3) or (external memory - SanDisk Extreme 64 GB - Up to 80/50MB/s read/write speed ) ? I don't know what is speed (read and write) on note 3. Anybody know about that? Note 3 has USB 3.0, does it make all the apps run or play faster?