I recently downloaded firmware v3.4.3 for my ds-7608ni-i2/8p. It was originally on 3.3.5. I downloaded the firmware on US Hikvision com. My nvr is australian, I installed v3.4.3 and it was successful, the cameras did not show up though and i checked in the maintenance to see the cameras saying not connected. I upgraded again to v3.4.92 and the same thing happened. it is accessible to everything but my cameras. I upgraded via usb.