3.Press the Up/Down button to select the “Lock” option.
4.Press the Menu/OK button to confirm and exit.
5.A lock icon 
will appear on that image when it appear on the LCD.
6.To unlock a locked image, press the Menu/OK button.
7.At step 3 select “Unlock” and press Menu/OK to unlock the current file.
Delete
Delete unwanted photos and videos at any time to free up memory. You can delete one image or video clip at a time or delete all the unprotected photos and videos that are currently recorded on the memory card at once. Remember to download images frequently to the computer.
1.Press the Menu/OK button.
2.Press the Left/Right button to select the Delete menu option.
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