This upgrade file applies for the following models of NVR:    ZR04JB

1. Please go to NVR's System Setup - System Admin - System Version to find the Device model

    and download the right upgrade file.

2. Upgrading the NVR

2.1. Please copy theupgrade files to the root directory of the

      USB drive, then insert USB drive to the USB port of the NVR.

2.2. Please go to NVR’s System Setup - System Admin - System upgrade to upgrade the NVR.

Please note: 

please directly save the upgrade file in the root directory of your USB-disk, not save it under any folders.

It is better to use a 16GB or smaller flash drive with a Fat32 format.

If this can't help you, please feel free to contact us.