Intelectual Property of files uploaded to Ubuntu One

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http://askubuntu.com – Ubuntu, I am an artist thinking about using ubuntu one to back up my art / photos / other work. I have a very important question about the files and photos that I upload to Ubuntu one: Do I lose any rights of ownership by uploading the images and files to ubuntu one? I want to make sure that the files and images that I upload are still my property, and that ubuntu has no right to use or sell them for any reason. Thank you in advance for your prompt response. ~Emily (HowTos)