Android Question How to access extra usb disk

The only way to access SDCards or USB-Sticks is
https://www.b4x.com/android/forum/threads/externalstorage-access-sd-cards-and-usb-sticks.90238/

Don´t know if you need to setup something special for your USB-Stick. But if it is connected successfully to Android then you can use the Class to Access it.