iCloud storage is used up. Can I buy my own storage and still be with family sharing for other stuff?

I am not the Family sharing organizer. There are three family members in our Family sharing. Among other things, we share iCloud storage (2 Tb). The other two family members are using up almost all of the storage.It seems to me that anyone of us could purchase his/her own 2 Tb of iCloud Storage. But we would like to continue using Family Sharing for all other sharing aspects. The new person who purchases a new iCloud storage would use that storage on her own, but we would like that person to continue using Family sharing (except the Family sharing iCloud storage). I have literally read dozens of articles about the Family sharing and iCloud Storage. However, none of them specifically explain what happens when a member of Family Sharing wants to purchase his/her own storage while still being part of that Family sharing group (except the iCloud storage). Assuming what I've described is possible, how can the person who purchased the new 2Tb storage account transfer what was stored in the Family Shared iCloud Storage into its own iCloud Storage?. Can anyone shed some light on the subject. Thanks!