Dahua NVR21-4KS3 Series User Manual page 115

Step 2 Press the button on the 2 sides to open the front panel.
Step 3 Match the 4 screw holes on the HDD with the 4 holes on the bracket and then fasten the
screws.
Step 4 Push the HDD box into the device.
Figure 3-28 Unlock front panel
Figure 3-29 Open front panel
Figure 3-30 Fasten HDD
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User's Manual