Setting up a Google family group to share storage

Worth knowing before anyone joins: the person who set up the family pays and controls the plan. If someone leaves, or the plan is cancelled, they drop back to their own free 15GB, and if they're using more than that their stuff stops backing up until they clear space.

You need a Google One plan first, the free 15GB can't be shared. Then in Google One settings there's a family sharing option, turn it on and invite people by email (up to 5 others). They accept from the email and the storage just becomes shared. People always ask so: nobody can see anyone else's files, photos or email. Only the space is shared, and the usage bar shows how much each person is using. One catch, you can only switch family groups once every 12 months, so if someone is already in another family they may have to wait.