[quote name='clockworx;29816]The Android System is not stored on that internal SD card' date=' so the only difference you'll see is reading/writing the files on the card. Even class 2 can probably keep up with the read demands for playing video that our device can handle.[/QUOTE'] In essence, you are correct. The difference between a class 2 and class 6 is likely milliseconds. That being said, those milliseconds can provide a smoother experience. Faster page turns, video stuttering less and smoother transitions between large picture files in a slideshow are some of the benefits gained. It creates a better quality experience. I can mean the difference in how you perceive the quality of the product.