Instructions are written poorly. They state,
Use one of the following:
- USB Flash Drive (for AVIC-5100NEX, AVIC-6100NEX, AVIC-8100NEX and AVH-4100NEX) formatted to FAT32 and 2GB or larger in capacity OR - MicroSD card (for AVIC-7100NEX, AVIC-8100NEX and AVH-4100NEX) formatted to FAT32 and 2GB or larger in capacity Either storage device should be blank without any files on them. Which USB port to use: IMPORTANT: Only USB Port 1 on your NEX head unit should be used to update the firmware.
.. Now is the USB 1 port only in referance to the USB drive method or is it being assumed that yo