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Step 7  Select your USB storage device from the USB Device drop-down list box, then click Export. 
 
Step 8  After the files are exported successfully, if you want to continue to export the recording 
files on other pages, redirect to the recording files on that page and repeat Step 6 
to Step 7. 
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The recording files with the suffix of .mp4 (R means normal recording, M means alarm recording) 
will be exported to the root directory of the USB storage device. 
4.5.3  Add Tag 
Overview 
The tag playback function indicates that you can add a tag to the recording at a moment when the 
recording is played back, so that the recording file can be quickly located by the tag name. The 
system supports searching and positioning by tag keywords. 
Add Tag for Channel Recording File 
Assume that you found an alarm recording when you searched the recording file of D1 all day on 
October 30, 2021, and you want to add a tag to this recording.