There's that word "free" and so we pay attention when David Passell suggests we look at this article from ZDNet. One sentence in the article says: "All you have to do is donate 150 GB of your unused disk space on your computer." That gets you 100 GB of Cloud Storage for free.
David comments, "Here is a link to a story that I don't think I would touch, especially after reading some of the comments. Reminds me of the people who drive 50 miles to save 10 cents a gallon on gas. If I want more storage I will roll my own."