Hello i bought a bv6000 just 2 days ago on amazon. I have tried to connect usb on otg port but nothing happend.. I tried same test app but no one read the usb... i used the same cable and the same usb pen drive on a bv5000 and all work perfectly..
i read in your forum that must replace the otg card.
Firmware v01_20161011
Waiting for your reply