Trump wasn't charged with anything to do with "classified" records (it was willful retention of NDI), as classification of the records in the indictment was irrelevant.
Team Trump framed it that way, falsely claiming he had "declassified them just by thinking it" and therefore could retain them.
On this date in 2023, Donald Trump became the first former U.S. president to be charged with federal crimes as he was arraigned in a Miami courtroom; he pleaded not guilty to 37 felony charges that related to his alleged mishandling of classified documents.