I think they may have the hard drive already and much more after watching Trumps last night, he appeared pretty Confident that they will find Hillary’s missing emails, which makes me think they have them already.
I can tell you this, as a person with in depth knowledge of quite a few operating systems, I would not be able to help myself if I was involved. I would have made a copy to hack at myself. Meaning, the truth has been available for at least 3 years, and there has to be more than one copy.
I don't think you understand the situation.
The DNC 'server' is actually a server farm consisting of over 100 hard drives. They have been in the Ukraine, never here in the US. That is why the FBI could not take possession of them and investigate them. That is why CROWDSTRIKE, hq'd in the Ukraine said they 'investigated the server'.