Testing the next release of MIT App Inventor (nb187)

[Anke]

@TIMAI2

They infer that what I want to do is possible, that is to read non "media" files from a Documents or Downloads directory

And again: No ...

@Anke

on devices with Android 10+, non-media files are only accessible if the app has created them itself.

Here are two nice short tutorials on scoped storage:

Scoped Storage in Android in a Nutshell

Saving Files in External / Scoped Storage (API 30+) - Android Studio Tutorial

https://www.youtube.com/watch?v=dEASm7nv7DA