Q-See QSD371614C4-250 - Manual (Page 24)

Operation Manual-4CH Duplex DVR
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to change the value of the playback date and start time, then press the right mouse button.
Then use the left mouse button to click “Search”, the playback will start from the date & time
selected by the user.
8. BACKUP via USB Flash Drive
Our 4-channel DVR system has an enhanced back-up feature so that it’s possible to transfer
the video files recorded on the hard drive to USB flash drive.
Before you back up a stream of video data, have the USB flash drive formatted and ready
before attaching it to the DVR system.
In order to save the video data to these back-up devices, you should first start with playback.
Then press “MENU” button. Use “UP” key or “DOWN” key to move the prompt, then press
“SELECT” button to set the start time and the end time of the recorded video data that you
want to save to the flash drive. If you want to setup the end time faster, you can press the
button [
►► FWD] to change the play speed that you want, and then press [DOWN] to select
end time again.
Move the prompt to “USB copy”, and press “SELECT” button or click the left mouse button
to back up a stream of video data to the USB flash drive.