> “Defendant could have established such a personal privacy interest by submitting a sworn statement that could not be offered against him at trial as evidence of his guilt (though it could be used to impeach him should he take the witness stand),”

It sounds like he could provide proof that he owned the server having the contents of the server thrown out. Then provided he didn't take the stand in his own defense the affidavit couldn't be used. Not entirely certain though.