Jim's wife has a 32GB iPhone and she keeps running out of space because iCloud keeps downloading the pictures back to her phone. Leo says to look in the Photo settings. Make sure that the "optimize phone storage" feature is enabled. It will keep the full rez photos in the cloud, and a lower rez version on your phone. The other option is to turn off automatic sync to iCloud. That will prevent iCloud from putting them back on the phone and once the user deletes them, they will stay deleted. Then use Google Photos to save photos to the cloud and delete them off the phone. Leo says that Apple doesn't do a very good job educating users on how iCloud's photo backup actually works.