The NY Times is reporting (today 8/11) this: "Former President Donald J. Trump received a subpoena this spring in search of documents that federal investigators believed he had failed to turn over earlier in the year, when he returned boxes of material he had improperly taken with him upon moving out of the White House, three people familiar with the matter said…"
If that's true and he refused to turn over the documents - assuming that was what was asked - then why is the raid not warranted? He's denying an authorized court order.
This happens every time: what we think we know on Day One changes with what we learn on Day Two and Three. Always need to wait before jumping ahead of ourselves. That would be, er, me.