Where are notepad notes stored?
Android apps follow rules where each app is stored unter &lt;pkgname&gt;
and usually the data is stored in databases. big data (games) usually stored in obb  

/storage/emulated/0 is your Internal Storage (which is a view for /data/media/0)
/data/user/0 is a symlink to /data/data (where you have no access)
/data/user_de/0 is rarely used for some apps (not sure if this my country code or stands for DeviceEncrypted)  

so the example paths looks like this 

/data/user[_de]/0/com.randomlogicgames.battletext/files/
/data/user[_de]/0/com.randomlogicgames.battletext/databases/
/data/user[_de]/0/com.randomlogicgames.battletext/shared_prefs/
/data/user[_de]/0/com.randomlogicgames.battletext/cache/
/storage/emulated/0/Android/obb/com.randomlogicgames.battletext/
/storage/emulated/0/Android/data/com.randomlogicgames.battletext/files/