If u are using flutter with native app, then you can use path_provider and the dart File to get all you want in Android. However, ios is more like a sandbox, so it is hard to get what u want.
I am making a music player with flutter so, I wanna to ask how to access all the files of a particular extension ( mp3, wav ) with it's details in Flutter or if not in Flutter then Python to play those music files with details like song name, author name
Accessing Files from User Device using Flutter or Python