How do I get my photos into my wife's icloud storage
My wife allowed me to join her icloud storage through family sharing. My wife has 2TB of storage and has used a tiny fraction of it. However, when I then tried to backup my photos onto her storage (my photos consume 30GB), my phone refused. It said "More iCloud Storage Needed" and invited me to upgrade. Under "Upgrade Options," it doesn't allow me to store on her iCloud. I have tried other ways to get my photos onto her icloud storage and for the life of me can't figure out how to do it. I have also found no help online on this subject. Apple has tons of info on how my wife can share her storage with me, but it has next to nothing on how I can then use it.
iPhone 7