SharePoint Online announces 1TB site collections and unlimited tenant storage scale: http://blogs.office.com/2014/03/14/sharepoint-online-announces-1tb-site-collections-and-unlimited-tenant-storage-scale/
Stepping stones for crossing technological ponds
My technical experience put into words: hope it saves you some major headakes.
SharePoint Online announces 1TB site collections and unlimited tenant storage scale: http://blogs.office.com/2014/03/14/sharepoint-online-announces-1tb-site-collections-and-unlimited-tenant-storage-scale/