Before you can download anything on your tablet, you have to make sure that you have enough space. To view the available space of your internal storage / memory card, go to Settings > Storage. To download large files, like movies, onto your tablet, it's advised to use a download manager tool. To obtain such application, use the Android Informer's database. In order to download movies from the Internet, copy their URL using your Internet Browser and copy the URL into the download manager application. The download will automatically start. It's advised to use a download manager because in the case of a network error, your download will be resumed and your data will not be lost.