To remove pictures from the Private Gallery, open the dfndr security and follow the steps below:
1- Tap on Tools tab and select the Applock feature.
2- Enter your pattern (or numerical password).
3- Tap on the icon with a checkbox to select the photos you want to remove.
4- Select the photos you want to remove and tap on “REMOVE FROM PRIVATE GALLERY”.
A confirmation message will show up. If you really want to move back the selected photos to your Android’s gallery or SD card, select “Yes”.