On my Android device it's
/data/data/com.nesbox.tic/files
It doesn't seem to exist. I can search with any file manager and the folder "com.nesbox.tic" does not exist. If I go into "Android/data/" where all my other apps data is it is not in there as well. It's weird because if I save a cart then search for it in my file manager I can't find it. But I can load the cart again so I know they're saving somewhere.