If you haven't come across Dropbox yet I would urge you to have a look. It's very simple and for anyone wanting to work collaboratively or share files effortlessly it is truly simple. I'm using it with some of the schools I've been working with. It requires an application installing which will enable you to synchronize files with the online storage.
This link will gain you and me extra storage space on top of the 2Gb you get for free; Win win.