We need a list of documents Trump had along with a list of documents Biden and Pence etc had. You also need to take into consideration the fact that Trump had the right to declassify.
You also need to take into consideration the fact that Trump had the right to declassify.
This is an important point which doesn’t get talked about enough. Trump, as president, had authority to declassify documents. Mike Pence was only the vice-president, and had no such authority. Ditto for the docs with Biden from his time as vice-president.