Why cannot I open the firmware update bin file? Bill Zhou Modified on: Fri, 24 Dec, 2021 at 2:34 AM There is no need to open the bin file, Just copy it to your microSD card's root directory and power the cam, upgrade will follow automatically.https://www.viofo.com/en/blog/viofo-firmware-update-guide-step-by-step-b34.html