The additional storage is applied to the OneDrive account that is linked to the microsoft365.com/setup account used to create the Microsoft 365 subscription. For Microsoft 365 Family, the storage is tied to the Microsoft accounts of the household members who have been added to the subscription. For Microsoft 365 Family users, only the account purchasing additional storage will receive the additional storage. OneDrive Basic 5 GB and OneDrive 100 GB subscriptions are not eligible for additional storage plans. When someone stops sharing their subscription with you, you'll lose all your Microsoft 365 Family subscription benefits, including extra OneDrive storage and the ability to use Office. You can still view and print your Office files, but you can't edit them or create new ones. Customers with an active Microsoft 365 Family subscription receive an additional 1 TB of OneDrive storage per user, for up to 6 users, plus 5 GB of storage for 1 user. Each additional user must have their own Microsoft account and be added to the Microsoft Account page. You can also sign in to your microsoft365.com/setup account online and order an Microsoft 365 subscription there. You can also purchase the software one-time as part of Microsoft Office. It is available in Office Home & Student 2019.