Having problems transferring my Kindle books from my PC to my a500 via 16 gig microsd card. It sees the "books", but when I try to open one it says it cant since it is not a PDF file. I tried to transfer to my Kindle app on my a500, but couln't see a way to do that. I went to all my ebooks apps and it would not open any of the books. I did notice that when I was dragging the books to the microsd card it said it would not transfer the properties. I suspect that has a lot to do with it. So does anyone know how to copy Kindle books from a PC to my a500? Thanks....