How to get more storage 

What happens to my Google Workspace Additional Storage if I switch editions?

• Entire organization–If you change your organization’s edition to one that doesn’t have pooled storage, such as Business Starter or Cloud Identity, your storage remains pooled and any storage from your Google Workspace Additional Storage add-on subscription remains available.

• Single user–If you change a user’s license to one that doesn’t have pooled storage, they can use only the storage included with their individual license.