LT Security LTD7904 - Manual (Page 71)

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Digital Video Recorder User Manual
Fig 7-9 file management interface
Lock: select certain file item in the file list box and click “Lock” button to lock this file that ca not be deleted or overlaid
Unlock: select a locked file and click “unlock” button to unlock this file
Delete: select an unlock file and click “delete” button to delete this file from file list
7.4.2 Remote backup
Click Backup button to enter into backup interface, refers to Fig 7-10: