“Trump wants the server not because of a Ukraine theory but to see if files were downloaded by a certain DNC employee by the name of _________. I forget his name.”
That server has likely been ground into microscopic pieces, and buried under the sarcophagus at Chernobyl
The server is the data not a physical device. Crowdstrike blamed Russia for hacking the DNC and releasing the emails to WikiLeaks.
A more plausible explanation is Seth Rich downloaded the emails and provided them to WikiLeaks and was murdered for it.
I think that is why Trump is skeptical about Russia, Russia Russia.