

Maybe a bit nuclear and more fun to think of than actually doing it but…: You could plant the fear that Google will just delete the pictures if trump or someone else decides he doesn’t like one of these fotos and then help them transition to a local storage.
My dad, my brother and I all made sure ASAP that our mother (wife in my dad’s case, absolutely a lost cause with anything internet because she never was interested in it outside of cat videos) thinks everything cloud is bad and just stealing her things and editing fotos to be nudes.

I did second “local storage” in my post. Only truly safe place for fotos imo because you actually have full control over it.
You might have to add a PC in between but once that’s done and connected (which really isn’t complicated, apps like My Phone Explorer can help) it’s really only a matter of pulling the foto folder from the phone to the HDD and that’s really easy to do.