If you have a gmail account and you use firefox, there is a handy add-on called "Gspace". It lets you turn all the free email storage that most people will never use anyways, and turn it into free online file storage.
An average gmail account has over 6 GB of storage, I'm only using 64 MB right now. So why not use it. The advantage is you can upload files and then download them from any computer with internet access. Even if all you use it for is backing up important documents, it might be worth giving it a try. You also get an email every time you upload something. So it's easy to archive your files into a folder, search through them, find what you need and download it.