Lazar claimed he succeeded in hacking into her private e-mail server and downloading some of the contents. "It was like an open orchid on the Internet. There were hundreds of folders," he told NBC News correspondent Cynthia McFadden before he was extradited to the U.S.
But Lazar refused to show any of the material he said he found on the Clinton server, and federal investigators said they have found no evidence to back up his claim."
https://www.nbcnews.com/news/us-news/guccifer-hacker-who-says-he-breached-clinton-server-pleads-guilty-n580186