I was reading through the inventory list from the tfg search that the judge made public here:
https://storage.courtlistener.com/recap/gov.uscourts.flsd.618763/gov.uscourts.flsd.618763.39.1_1.pdf
At first I thought "what a slob, just throwing random crap into boxes."
But then I realized, I bet these boxes organize purposeful collections.
When I say "he" I mean "he and his helpers/co-conspirators/etc."
So, say he has dirt on someone about some event in the secret documents.
He has a box for that person/event. He puts in it collections of media reports, cut outs of newspaper articles, etc. He puts in other relevant objects (the gifts/clothing (ETA - you know, like clothes with semen or DNA stains and so on)), he puts in photos and so on.
I bet these are organized around topics, people to blackmail, and so on. I bet they are projects that he assigned people to research and he put the material they returned (secret and classified documents, media articles, other government documents, etc.) in to a box. Like "go dig up some dirt on so-and-so" and they come back with a box of materials.