A properly linked external site seems best to me. Probably more value and more functional. Maybe some guidelines/rules so we can clean up if it gets too cluttered? Happy to chip in to get extra storage with either option.
Go to “Profile” then “My Recent Posts” and then scroll though them to find the ones with photos then edit them, delete attachments and save. That’s what I do. It’s a bit laborious. If there is a quicker way can someone let me know.