Where are notepad notes stored? A simple question really, where do apps such as notepad store their data (the notes)?

Additionally, where do offline games store their information (such as what level you're on)?
I've looked at the android/data/ files, but they're often empty. Any tips?

Example below:


According to that, the app uses 30+ mb of data


But, the file for that app (Internal Storage/Android/data/...) only has 8mb inside it. Where's the rest?

Edit: what's a "data" file? Here's my internal storage:
.

I'm on EMUI 9.1.0 and Android 9.
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/