Judge Andrew Napolitano says that Hillary Clinton was “incompetent” as secretary of state because the BlackBerry she used to send and receive emails didn’t work in her office.

Clinton’s chief of staff while secretary of state, Cheryl Mills, revealed in a deposition that Clinton “exclusively” used a BlackBerry, not a laptop, desktop or a tablet to communicate electronically. (RELATED: A Federal Judge Once Called Cheryl Mills’ Handling Of A Clinton Email Scandal ‘Loathsome’ And ‘Totally Inadequate’)

[dcquiz] Appearing on Fox News’s “Fox & Friends” on Thursday, Napolitano explained that the device was “her BlackBerry, not a government-issued BlackBerry.”

“Because it was not government-issued, it was blocked on the seventh floor of the State Department, where her office is. What does that mean? That means that when she was in her office, she did not have the means to communicate electronically to her people all around the world for the entire time she was there,” he said. “How did she do it? Take a security team, go from the seventh floor to the sixth floor where her BlackBerry worked.” (RELATED: Lawyer For Cheryl Mills Blocked Questions About Hillary’s Server In Recent Deposition)

Another way Clinton would communicate would be it have an aide “read the document” to her, Napolitano said. “So when people are saying she was incompetent as a secretary of state, they are absolutely correct and right on the mark because of this alone. She has ambassadors all around the world trying to communicate with her, and she’s cut herself off.”

Napolitano later said that “100 percent of her emails were taken away from the government server and run through the private.”

Host Brian Kilmeade followed up, asking if Clinton’s emails were available through the Freedom of Information Act.

Napolitano replied that Clinton “frustrated the ordinary operations of the State Department, which she was in charge of because she was terrified of the president, the rest of the State Department, the media and the public knowing what she was doing.”

Napolitano later said that it is “crystal clear that the motivation for all of this was her incredible desire to avoid the Freedom of Information Act, to keep from the president, the rest of the State Department and the public what she was doing as secretary of state, which is a violation of the law.”

WATCH:

Watch the latest video at video.foxnews.com

Follow Steve on Twitter and Facebook