Dahua DH-XVR5104HS-4KL-I3 User Manual page 260

Click Lock to lock the data.
The export button is enabled.
Click Export. The system starts exporting the data.
Click OK.
You can find the exported data on your USB device.
5.12.2.4 Configuring Alarm Linkage
You can configure alarm linkage settings for temperature and humidity data.
5.12.2.4.1 Configuring Alarm Linkage for Temperature Data
On the home page, select IoT > Management > Temperature/Humidity.
Humidity
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User's Manual