Moreover this is an android TV box, PC can see nothing if box is connected to pc.
I can't use ES file explorer, because I need to my program can handle if pendrive is connected to my device. When ES file explorer is installed, it always pop-up what I don't want. And the main issue is, what is the reason, that the installation process take one package into the Android/data, and other packages takes to another place.
Ok, thank you Manfred!