Actually no. Trump wasn't charged for any of the document's he returned. Nor was Pence. Both Pence and Biden were the ones that informed authorities of the existence of the documents. Both fully cooperated with the authorities and the documents were in custody
in days.
Trump dicked around for a year and half. While showing classified docs to random people. Authorities finally had to execute a warrant and seize the documents after Trump refused to return them, lied about them, compelled his lawyers to lie and actively *hid* them from authorities.
If he'd returned the documents like Pence and Biden had, he wouldn't have been charged. Don't take my word for it. Once again, William Barr:
“Over time, people will see that this is not a case of the Department of Justice conducting a witch hunt,” Barr said in an interview on CBS on Tuesday. “In fact, they approached this very delicately and with deference to the president, and this would have gone nowhere had the president just returned the documents. But he jerked them around for a year and a half.”
NARA didn't know he had them. Neither, apparently, did Biden. Same with Pence. Pence didn't know he had classified docs. Neither, apparently, did NARA.
When both of them learned they had such documents, they were immediately returned.
Trump returned *some* of the docs. After dicking around for over a year. And he wasn't charged for any that he returned. But he willfully kept others.
Trump was charged for every single one he refused to return. That's what willful retention is.
There were zero docs that Biden or Pence refused to return. If Trump had simply returned the docs like Pence and Biden did, we wouldn't be having this conversation.