Google may have rolled out its cloud-storage Google Drive last week, but some 500 million internet users may never have a chance to try it out - those in China. Having hit the country's so-called Great Firewall, Google Drive has joined a host of other services banned in the communist nation, such as YouTube, Google+, Twitter, Dropbox, Facebook and Foursquare. When the firm checked for technical issues on its side, it found none, a Google spokesman told the BBC.