How do I delete old pictures from my auto backup and my gallery and Android LGL39C?

[AC Question]

How to delete old pictures from my auto backup and my gallery and android LGL39C

 

[B. Diddy]

Welcome to Android Central! Are these photos backed up to Google Photos? If so, use the Google Photos app to delete the cloud photos. You can also delete them from the Google Photos website. The Gallery app usually can't delete cloud photos.