Saving of icons and wallpaper?

Hi there, I set a kwlp with action buttons for app launch's etc then when I go to sleep and wake in the morning or if phone is inactive for more than 8 hours unused for app launches and background are all gone just a default grey background.

I have been saving items locally on my phone under kustom icons and kustom wallpaper areas in my file manager. If I go to my file.manager next day as well these files have disappeared from there too.