Dahua NVR4108-P User Manual page 273

Please refer to the following sheet for detailed information.
Parameter
Channel
Pre-record
Redundancy Check the box here to enable redundancy function. Please note this
Snapshot
Holiday
Setup
Copy
Figure 5-75
Function
Please select a channel from the dropdown list.
Please input pre-record time here. The value ranges from 0 to 30.
function is null if there is only one HDD.
Check the box here to enable snapshot function.
Check the box here to enable holiday function.
Click the Setup button, you can set record period. See Figure 5-74.
There are six periods in one day. If you do not check the date at the
bottom of the interface, current setup is for today only.
Please click Save button and then exit.
Copy function allows you to copy one channel setup to another. After
setting in channel, click Copy button, you can go to interface Figure
5-75. You can see current channel name is grey such as channel 1.
Now you can select the channel you wan to paste such as channel
261