If you have some documents,videos or music that are important in your computer and you need them to be backup all the time whenever you make change on the file.You can use Dropbox which are available free for 2GB of storage but you can make it to 8GB for free by inviting friends onto Dropbox.
Just drag and drop the file into the Dropbox sync folder and it will automatically backup your file into their server.They work well on Windows,Mac,Linux and even iPhone.So that will be no chance of losing your documents.Easy,Fast and Free!
