Hi,
some android users detect that they didn't see all files and assume to have root to see all RR3 files.
root isn't necessary... it's a simple setting in the filebrowser of android.
Start the filebrowser hit the menu button and a menu is displayed where you can choose "settings"
On top (may variate on android version) you have now the option "show hidden files". check this and you now see in the RR3 directory also the ".depot" directory where all resources for the game are placed.