71R4, R8, R16 DVR V8.1.0 User Manuall. Click OK to begin. The progress bar at the bottom of the window shows you the progress of the backup.m. Allow the backup operation to complete before continuing.9.1.3 Event Search, Playback and backup videoClick the Events option at the top of the Search screen. Use Event search is used to search for event triggered recordings during atime frame. You can easily back up the recording to a USB flash drive.SECTION 9: SEARCH, PLAYBACK, BACKUP AND TAGS