Sounds like a Fourth Amendment violation: “The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.”
The thing is, his defense team/attorneys will not be given access. Who’s to say US won’t tamper with, and insert some damning “fake evidence” in there?
If I see the US say, “Assange’s Computer shows he plotted w/Russia to murder Seth Rich” I will know my Country is totally down the toilet.
I don’t think Ecuadorian territory (embassy) is covered by the Fourth Amendment to the United States Constitution. Especially since the material was seized not by U.S. officials, but by Ecuadorians. What they do with it after that is their business. That doesn’t mean that I like the idea.