Mann... I wish I saw this sooner, I deleted the file because it keeps crashing when I insert 'archieve.rpa'. Someone says it because of the previous file and it's fine to delete it because the progress I made is saved somewhere and..... I..... believed him..... Haaa....
Viewing post in Step by Step: Installing Eternum on Android comments
Sorry but I can't follow your narrative. I suppose you lost your saves? The original single-apk version of the game only stores saves in its own app-specific storage (Android/data/Eternum). That storage gets cleared when you uninstall the app. The newest version of the game however stores a second copy of your saves in the file system; so you can easily make a backup of them and they won't get deleted when uninstalling the game.