Asphalt 8 airborne cars bought folder or file

Hello to all who read this thread. I would like to know in asphalt 8 airborne, in offline mode, when you buy a car, where is that information stored, in which file or folder. I’ve used v 3.4.0 with hot wheels cars, and boght 201 cars, but when I install v 3.5.0 and place the 2.3 Gb or something folder from v 3.4.0, the game install 300 Mb more, and all my cars disappear. I don’t want to use an online accout, just copy and paste a file or folder needed. Thank you for all or any help provided. My Phone is samsung gt-I9300I with android kitkat 4.4.4