: Insert the USB into the NVR’s front or rear port. Navigate to Main Menu > System > Upgrade .
: Download the firmware zip file, extract it on your PC, and copy the .pak file to the root directory of the USB. cp-unr-4k2161-v2 firmware download
: Confirm "CP-UNR-4K2161-V2" on the sticker at the back of the device. : Insert the USB into the NVR’s front or rear port
You can update the firmware using a physical USB drive or remotely via a web browser. Method 1: USB Flash Drive (Recommended) extract it on your PC