If you have a subscription, you can download the movies for offline playback within these streaming apps:
: You cannot directly download an MP4 file to your Google Drive from these services — they use DRM protection to prevent unauthorized distribution.
: The collection can be bought or rented directly.
The eight Harry Potter films were released between 2001 and 2011 and are based on J.K. Rowling's seven novels (the final book was split into two films). Here's the complete list in the order you should watch them: