For those of us not used to cloud storage, it does take a little while to rewire your brain. I'm a heavy user of Google Apps and Zoho CRM, but for the plethora of files that I store on local disks, I have to consciously stop and rethink what I am trying to accomplish. I found Amazon's cloud storage for music a horrible application, but, for the Chromebook, I signed up for Dropbox and it works like a charm...not only as a place to store files, but automatically provide access to them from any computer on which you set to be synced. It's free for up to 2GB of storage.
I'm not going to lie, I have been consciously storing everything in different cloud solutions to see which ones I liked the most. So far I really like PennyBackup!