The upgrade process as below,

1. Unzip the firmware file.

2. Prepare a USB flash drive and format as FAT32.

3. Save the upgrading file into USB flash drive.

4. Take this USB flash drive and plug into DVR USB port.

5. Go to “Menu > Advance > System”, move cursor to “Upgrade” and select “Yes” to upgrade.

6. You would see upgrading proceed and reboot after upgrading process.

7. Unplug USB flash drive.

8. Go to “Menu-> Advance-> System”, move cursor to “Reset” and select “Yes” to reset the system.

9. After system comes back on, you are done with the firmware upgrading.