From NYT story before Comey firing:
On Nov. 5, three days before Election Day, Mr. Strzok and his team had 3,000 emails left to review. That night, they ordered pizza and dug in. At about 2 a.m., Mr. Strzok wrote an email to Mr. Comey and scheduled it to send at 6 a.m. They were finished. A few hours later, Mr. Strzok and his team were back in Mr. Comey’s conference room for a final briefing: Only about 3,000 emails had been potentially work-related. A dozen or so email chains contained classified information, but the F.B.I. had already seen it. And agents had found no emails from the BlackBerry server during the crucial period when Mrs. Clinton was at the State Department.