iCloud family sharing
I have bought 200 gig on my iCloud to share with family but they are unable to access this storage due to an error which keeps popping up and it’s states the date you which to store doesn’t fit into my storage plan
iPhone 6s
See the following Apple articles:
Make sure that each family member has a unique Apple ID
Make sure that each family member has a unique Apple ID - Apple Support
Share iCloud+ with your family
Share iCloud+ with your family - Apple Support