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I see. I think the problem of the updating by installing a new ver while not deleting the old ver is followed due to phone storage problem. 

I think I'll replace the savefile on new ver with one i have, it will be easier for me with having problem with storage.

Anyways, thank you for the help! 

Sorry for not responding for so long. 

So i found a good file manager that shows me the save files, if i import these save files into other folder delete the old ver, then download the new one and import these save files might it work?

And if yes, do i all of these save files or only certain ones.

I have a question about save files on Android. 

Do i have delete old ver and download new one and star all over again? 

Or is there any method to extract a save file out of folder that i don't know about, since android shows nothing in the suppossod folder where the save file should be. 

I heard of a thing that you don't delete the old ver and just download new ver and open it. But it doesn't work for me, it's just saying that "the app haven't been installed", or " This app already exists".