Q-See QSD2216 - Manual (Page 33)

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If you want to search from MASTER HDD to SLAVE HDD, press the SERACH button, and then
press Enter button. Press the Menu button to exit.
6.10 Record Search
Move the cursor to the Record Search, press the Enter button, and the record search window will
appear, which is illustrated as below.
All recorded segments are displayed here, press the up or down button to move
the cursor along the segment list, press left or right buttons to see previous or next
page, press the Enter button to play the segment you selected. Press search
button again to return to the Search Play menu.