Hillary Clinton suggested to FBI investigators in a July interview that she had little understanding of classified information when she served as secretary of state.

Clinton told FBI agents she could not remember ever receiving any training for how to preserve federal records or treat classified material.

"Clinton could not give an example of how classification of a document was determined," the FBI wrote in its notes.

"Clinton did not recall receiving any emails she thought should not be on an unclassified system," the FBI wrote.

What's more, Clinton said an email that was central to the investigation, one that involved conversations about a planned drone strike in Pakistan, didn't raise any red flags when she transmitted the highly classified information over her unsecured server.

"Clinton stated deliberation over a future drone strike did not give her cause for concern regarding classification," the notes said.

Cheryl Mills, Clinton's former chief of staff, was present for the interview as a personal lawyer.

Clinton's homes in Washington, D.C., and Chappaqua, N.Y., had been outfitted with a SCIF, or a secure area in which classified information can be read, at the outset of her tenure.

She told agents she was unaware of the digital program in place at State to preserve records and had instead implemented her own system of dividing personal and official hard-copy files.

The revelations came in 11 pages of notes from the three-hour interview with Clinton at FBI headquarters.

Read the full FBI notes on the Clinton probe here.