I can’t find the READ_INTERNAL_STORAGE in Manifest.permission | Android Developers.
From Data and file storage overview | Android Developers
By default, files saved to the internal storage are private to your app, and other apps cannot access them (nor can the user, unless they have root access). This makes internal storage a good place for internal app data that the user doesn’t need to directly access. The system provides a private directory on the file system for each app where you can organize any files your app needs.
Reading from/writing to AsyncStorage and FileSystem.documentDirectory requires no permission and appears to have the same functionality as the above description, so what is this permission used for?