Access USB drive on Android

[achimmihca]

Actual behaviour

UltraStar Play can not access a USB drive that is connected to an Android phone.

You can see the path of Android drives using ZArchiver
As you can see in the attached screenshots, USPlay can see the SD-Card drive but not the USB drive.

Not sure which permissions are missing.

ZArchiver:

UltraStar Play:

Expected behaviour

Song files on a USB drive should work just as well as song files on the internal storage and SD card storage.