On our subscription, we have 6TB - 1TB for 6 people each. We are only using 2, but there is no way to combine storage so it would be 2TB on one account, and the rest are 1TB each, now only 5 accounts.
this will be extremely useful. To assign different storage capacity per user, with the maximum of the total subscription. In that case we can use OneDrive to backup the full photo library of the family (as an example)
Bosco Soans commented
This is already expressed in the below idea. Please rather vote for it. It needs to reach 500 for MS to look. FYI - I've not created that idea.