Since the project is already at 2.4gb...
For Android, i would highly advise creating archives (rpa) of the images from the older content periodically to keep the apk sizes relatively small. If they get too big they stop working.
People can then take the archives and manually add them to folders where the game is coded to find them. You will need to make a secondary folder however for that as Google is an ass and hard locked out the normal Android folders such that it now requires root access. Or accessing it externally.
If you don't know how to do it, most of the porters on f95 do, so you can easily get the info. I don't know the code or i would put it here