The audio tapes were not classified documents.
And Hillary definitely exposed America's national security secrets on her personal server, which she wiped after subpoena.
She ordered her server manager to delete personal files two weeks prior to a subpoena, a deletion that is routine. Did Hillary know that her server manager didn't actually delete them until just after the subpoena? No evidence to that claim has yet to be produced in a court of law. Until then, yours is pure speculation.
There is no evidence for your claim. Only three of the 30k emails were marked as 'confidential' as indicated by the marker 'C" on the emails. One doesn't indict a high value target on such evidence. There is no evidence that those emails contained TS/SCI documents, as were mishandled by Trump. Given the markers, it's not likely. .Yes, some in the FBI deemed there were over 100 emails that should have been marked as classified. However, that's a determination made after the fact and not by the issuing authority, and by virtue of that fact, a prosecutor knows that a competent attorney can easily destroy that contention on cross. This is why Director Comey, a lawyer himself, declared on TV that no prosecutor would prosecute Clinton based on this kind of evidence.