Dahua DHI-NVR5208-4KS2 User Manual page 277

Step 4 Click the file that you want to upgrade.
The selected file is displayed in the Update File box.
Step 5 Click Start.
4.10.4.4.2
Online Upgrade
When the Device is connected to Internet, you can use online upgrade function to upgrade the
system.
Before using this function, you need to check whether there is any new version by auto check or
manual check.

Auto check: The Device checks if there is any new version available at intervals.

Manual check: Perform real-time check whether there is any new version available.
Ensure the correct power supply and network connection during upgrading; otherwise the
upgrading might be failed.
Step 1 Select Main Menu >> OPERATION > SYSTEM MAINTAIN > UPGRADE.
The UPGRADE interface is displayed. See Figure 4-200.
Step 2 Check whether there is any new version available.
Auto-check for updates: Enable Auto-check for updates.

Figure 4-200
Local Basic Operation 266