https://www.washingtonpost.com/news/post-politics/wp/2017/03...
But I can't find anything about physical destruction, CrowdStrike claims to only have ever had images of the systems.
https://www.crowdstrike.com/blog/bears-midst-intrusion-democ...
In 2018, the DNC said “The FBI was given images of servers, forensic copies, as well as a host of other forensic information we collected from our systems.”
https://www.thedailybeast.com/trumps-missing-dnc-server-is-n...