There was a dangerous patter during the Trump administration re Trump's cavalier handling of highly classified documents and information.
When he reluctantly left office (following his unsuccessful coup), Trump took a bunch of highly classified shit that he was told that he couldn't take. National security protocols exist for a reason.
Hence, the ONGOING crime(s) began on whatever day Trump stole the shit from the White House. [The National Archives were the first to identify missing documents]
Since JAN 2021, has there been additional crimes? Who knows.
Do I believe the search warrant was executed merely because the Government got tired of saying "Mr. Trump ... would you return the shit you stole ... pretty please?" No, I think there is more going on.