This is a great and free way to back up your files online. It's simple: just download the dropbox application, then it makes a folder on your computer, and you can drag and drop files into it; from there, it syncs with your online account and you can access it from any computer with internet access. They also have a nice iPhone/iPod Touch application that I find quite useful.
I really like their free service; you get 2GB for free, but there's options for more storage for a fee (50GB for $9.99 a month/$99.00 a year or 100GB for $19.99 a month/$199.00 a year).
