I ran across this dark and early this morning and thought it might be of interest to juniors and seniors, especially given how often I see students worrying about carrying files on thumb drives, e-mailing things to themselves, etc.
This service is called Copy, and what it does is places a folder on your computer called COPY. You can also access it over the Internet. Anything you put in that COPY folder is automatically sync'ed to all of your accounts. So, for example, if you saved a file to your COPY folder at school, then go home and open your COPY folder, all your documents will be there, available at home, and up to date. It includes apps for Mac, Windows, as well as mobile devices, and is quite easy to use. Could be mighty useful for those of you going off to college next year as you work on your personal computers, in school computer labs, etc., as well as those in the high school doing group work and projects.
Hope you find it valuable -- just for signing up you get 15 GB free, and another 5GB when you install the app/folder on your computer.