Special counsel Robert Mueller said federal prosecutors have evidence that is “both voluminous and complex” in the case against a longtime associate of President Trump.

“It is composed of multiple hard drives containing several terabytes of information,” wrote prosecutors in a court filing Thursday, asking the federal judge overseeing the case against Roger Stone to designate it as complex.

That includes banking financial records and communications taken from iCloud and email accounts, as well as cellphones, computers, and hard drives.

“The communications contained in the iCloud accounts, email accounts and physical devices span several years,” wrote both Mueller’s team and the U.S. attorney for Washington, D.C. “The devices are currently undergoing a filter review by the FBI for potentially privileged communications.”

Stone, 66, was charged last week with lying to Congress, witness tampering, and obstructing the special counsel’s investigation, and on Tuesday, he pleaded not guilty to all charges in Washington. He is expected in court again Friday before U.S. District Judge Amy Berman Jackson.

The court filing said Stone’s defense agrees the case should be designated as complex by Jackson, which would exclude it from the Speedy Trial Act and make there be a protective order over the evidence. This is standard in high-profile cases and would protect evidence as prosecutors begin sharing it with Stone’s legal team.

Stone is under scrutiny for his alleged connection to WikiLeaks, which released hacked emails from the Democratic Party during the 2016 presidential campaign. Stone lied about his communications with WikiLeaks and senior Trump campaign officials, the special counsel alleged.

Stone accused the FBI of treating him worse than al Qaeda founder Osama bin Laden — who was killed by a team of Navy SEALs in 2011 — when they arrested him in a pre-dawn raid at his Fort Lauderdale, Fla., home.

In an interview with the Daily Caller Wednesday, Trump deplored the arrest, saying: "I’m speaking for a lot of people that were very disappointed to see that go down that way. To see it happen, where it was on camera, on top of it, that was a very, very disappointing scene."

Earlier Wednesday, Sen. Lindsey Graham, R-S.C., the chairman of the Senate Judiciary Committee, sent a letter to FBI Director Christopher Wray questioning the manner and timing in which Stone was arrested, including "the number of agents involved [and] the tactics employed."