The Quick Cleanup feature is helpful for improving your deviceâs performance. This function eliminates navigation data, junk files (residual files and cache), and temporary files saved by Android and other apps.
To use Quick Cleanup on your phone on your cell phone you can click here or you have these options:
Option 1-
1)Open dfndr security,
2)Tap on the Quick Cleanup 
shortcut located on the main screen.
Option 2-
1) Open dfndr security
2) Tap on Tools tab
select the Quick Cleanup feature
3) Select the Quick Cleanup feature
4)Wait for the files to be removed and that’s it!