Godot 3.6 read external files on android project

I am using Godot 3.6 and I have an Android project that involves reading and writing text files, but I am having trouble importing external files from “storage/xxx-xxx/books/texts“ or reading from the phone’s internal memory.

var file = File.new()

Additional information: I have already granted permissions such as Read and Write external devices in the export options.

Does it print any error in android?
Can you share the code you are using to read/write?