Digital Video Recorder User Manual425.7 Locking & Deleting FilesUsers can control all video files, including locking and deleting them. Onceusers lock an important file, it cannot be overwritten or deleted, but the lockedfiles can still be cleared by formatting the hard drive.STEP1 Press right mouse button to show the control bar. Click Menu, referto Fig 4.2 Pop up Menu.STEP2 Click Search----->File manager, the window below will appear.Fig 5.9 File ManagerSTEP3 Click Date to change date using a calendar, click Search to refreshthe list. The files found will be listed in the file area of file manager at bottom. Itshows the details of every file, like start/end time, lock state.STEP4 Select the files and click Lock, it will lock the selected files. At thistime, a letter “L” will display at the end of the file rows as in Fig 5.9 FileManager.STEP5 Select any files which are unlocked, click Delete. A warning windowwill display. Click Ok to delete them.