How can I share my iCloud storage with my iPhone’s storage???
How can I share storage???
iPad Air, iOS 12
You cannot.
iCloud Storage is in iCloud, i.e an Apple server somewhere in a bunker.
iCloud storage is not meant as an addition or complement to your phone's physical storage.
iCloud is a syncing service. So anything stored in iCloud by virtue of how its designed must also exist on a physical device and take up space.
Having 200GB of iCloud storage does not mean you can have 200GB of storage on your iPhone.