"The cloud" is a security risk. I keep everything on my device, and backup to pc as necessary. I do have access to SpiderOak, but important stuff is encrypted on top of their encryption, and the rest isn't so important.
What I am worried about isn't so much more of a security risk, but companies having access to your data.
That's a security risk. Companies aren't your friend. They'll sell you out as soon as it benefits them to do so. Regardless of what they put on paper, policy isn't a security feature. That can be changed by a pen stroke, and turned inside out. The only security you can trust is what you do yourself.
So I see that is a major drawback with mobile devices. (Or iOS devices)
At least with desktop I can save the work onto my hard-drive.