I got same problem both app old new wasn't letting me download it.....I'm starting to not like mega old and new not letting me download I deleted storage I even ran anti virus and delete cache app store even restart my phone none of it not letting me download android apk
Some people have suggested me using JoiPlay. They say it's easy to setup, needs at least 2GB ram on your phone an it can work with files up to 4GB (You can play PC versions on your android phone with this emulator)