Not to worry. I have an 8GB SanDisk Class 2 microSD stick in my Apad right now and it is working great without any problems. I think the difference is between the classes is not worth the price in my book. Good Luck! BTW, the 32GB microSD cards just came out in Asia. The will be hitting the western world pretty soon I think if you want to wait for it. But then again, I image they will be pretty pricey. Again, best of luck.