I am going on a trip in the near future and I wanted some movies on my tablet. I downloaded several movies via Google Play onto my tablet and because I wanted to save space on my internal memory I managed to move the movie files onto the external sd card. The movies will not play now though. The first few seconds of the movies play and then they stop. I assume this has something to do with DRM as the files are called wvm files not wmv files. Is there any way to get around this? Where can I buy movies that will play from my external card? Should I download movies onto my pc first and then transfer to the external card on the tablet? If so where do I buy movies that can be moved to other devices?