Surveillance video can only save 4 days (the original can save about 15 days), is not the hard disk video recorder is a problem?
If that's the case, then you can consider replacing the hard drive.
Under normal circumstances is not the problem, is not you debugging the camera, changed the size of the video image?
You are not modified to save the format of the ~ !! You can choose to format the hard disk ~ !! Clear all the contents of the inside to see
