System Update; Upgrading File - Dahua NVR21-4KS3 Series User Manual

Step 4 Restart the Device.
After the Device restarts, the settings have been restored to the factory default.

5.19.4.4 System Update

5.19.4.4.1 Upgrading File

Procedure
Step 1 Insert a USB storage device containing the upgrade files into the USB port of the Device.
Step 2 Select Main Menu > Maintenance Center > Manager > Update
Step 3 Click Update.
Figure 5-324 Reset button
Figure 5-325 Update
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