For various reasons, playing again from the beginning.

I'm use "root browser" and go to:

data/data/com.gamesas.falloutshelter/files

But nothing is there, the folder is empty. Any kind of advice, how to save the game and where I'm wrong.

Pretty please with a strawberry on top.

what do you mean by this?

if you are looking for saves, you have to play the game before it makes vault1.sav

I solve it. Just needed new root program.