Applies to: DN81Q/DN41Q
The DVR needs an internal hard disk drive for recording. Without the hard drive, the system can show live viewing but can not record, playback neither.
Step 1: Confirm hard drive is installed.
Newly-installed hard drive needs formatting, enter the Main Menu-->Advanced-->HDD Management, click Format HDD.
Go to the Main Menu-->Record-->Video Mode
Select channel first
Set up time period
Go to the Main Menu-->Record-->Playback to check recordings.