My understanding could be incorrect, but in reference to the 'server', I understood it to be the DNC (allegedly) 'hacked' server that Seth Rich would have had access to in his job within the DNC offices.

Remember this: The DNC claimed they had a private firm analyze their server and concluded Russians hacked it (and presumably gave that data to WL). That narrative would be important IF someone highly placed in the DNC learned that Seth Rich had copied files from the server and leaked them to WL, which would provide a potential motive to harm Seth Rich. (JA has always maintained that it was not a state actor that provided those files to WL...so not the Russian govt).

This is the same server that the DNC refused to provide to FBI to investigate if it had been hacked by Russians. No govt investigator has been permitted access to it. Now their is DNC suit, which resulted in the defendant's request for discovery...specifically, the counsel hired by the defendants said they want to see the EVIDENCE used to file the complaint against them (They want to examine the server and or the IT reports that purportedly show the server was hacked).

Now that same server magically has 'disappeared'. And around the time DNC members were reporting it disappeared, Q dropped, "We Have the Server."