Hopefully this didn't get mentioned but a free program I use frequently is Dropbox. https://www.dropbox.com/
It's great if you have an iPhone or Android phone. You can download the Dropbox program onto your computer, transfer up to 2 gigs worth of files for free to the dropbox folder, and you can access your files on any other computer you have Dropbox. There is also a Dropbox app for Android and iPhone. It basically works like Apple's new iCloud.