The Washington Post reports: Federal prosecutors in Baltimore on Thursday said they will charge a former National Security Agency contractor with violating the Espionage Act, alleging that he made off with “an astonishing quantity” of classified digital and other data over 20 years in what is thought to be the largest theft of classified government material ever.

In a 12-page memo, U.S. Attorney Rod Rosenstein and two other prosecutors laid out a much more far-reaching case against Harold T. Martin III than was previously outlined. They say he took at least 50 terabytes of data and “six full banker’s boxes worth of documents,” with many lying open in his home office or kept on his car’s back seat and in the trunk. Other material was stored in a shed on his property.

One terabyte is the equivalent of 500 hours’ worth of movies.

Martin, who will appear at a detention hearing in U.S. District Court in Baltimore on Friday, also took personal information about government employees as well as dozens of computers, thumb drives and other digital storage devices, the government memo said.

The government has not alleged that Martin passed any material to a foreign government, but contends that if he is released on bail he could do so. [Continue reading…]