If you are using firmware version is lower than the V1.0.20.

When you want to upgrade to the newest version, You have to update via the webpage.

First, Please download the FW you want to update.

Then open the NVR webpage, Enter the System ¡÷ System Update page.

And use the "Firmware Upgrade" Function to update your NVR machine.
 
When machine is updating, Please do not remove the power.

After the update progress, NVR mahine will be auto reboot.