For every user in Centrium, you get additional 1 GB total storage for your data.

You can use this space to store files attached to notes, and for data you enter to Centrium (tasks, notes, deals, contacts etc), and additional database metadata used to store these records.

Because every company is different, we don't limit contact, task, deal and notes count.
We only care about total data storage you use. Current storage use can be checked in Account settings, in "Account summary" tab: