173
New Report: Over 40% of Google Drive Files Contain Sensitive Info
(www.infosecurity-magazine.com)
This is a most excellent place for technology news and articles.
Paid services doesn't equal security though. I think box.com has pretty good security and is free. Microsoft paid onedrive is a little sketchy to me. Not a drive service, but 23andme is a good recent example of non ad based services not necessarily being more secure.