User data in android 4.2 onwards is stored at
But still I found
/data/data directory in android 4.3 filesystem. I think it is there to store application data that is common for all users and
/data/user/<userId> is used for storing user specific application data. Is this true?
/data/data always belongs to the primary user. You can see this by listing
/data/user/0 is a soft-link to
/data/data and the permissions are set so that only this “user 0” has access to all the data stored in
/data/data is not common for all users.