All presidents get SS protection, so they see and hear everything Trump sees and hear, and they have to vet each visitor. They probably saw mfs bringing in boxes of documents and said nothing, or they were the ones doing it themselves.

And the toilet is in Trump’s resort, but surely the bathroom was a personal one nearby which can hide documents without anyone seeing. So there’s a 95% chance that the big man himself just wipes his ass after eating a ton of big macs and diet cokes and blasting his toilet.