Can you get access to SkyDrive Pro via Glow in SBC (you might have to go in via the outlook tile)? We’ve started using it for region-wide materials in Aberdeenshire. You can get 25GB storage, online editing tools, sync with personal computers and mobile devices. Seems to work ok, just a little cumbersome using the web interface in school.
Charlie Love has a basic intro video here: http://youtu.be/xBK8N8Q-PEQ