Lucie can you still ask?
Even with BJs link, all of that is listed refs GAFB not GAEE
When I look in the area described in GAEE all I see is
Managed individual storage would be a step up, but pooled storage would be ideal.
Google Admins can manage the storage. Which from what I understand is that if you purchase an extra 20 gigs you can apply and move that extra storage to any account you want. Not quite pooled storage but something: