Although the mainstream media in 2015 generally mentions only one Clinton email server, there actually are two in existence at this time. Both are located at an Equinix data center in Secaucus, New Jersey, and both are managed by Platte River Networks (PRN).
Clinton’s emails and other data had been transferred from the old server (which the FBI will later call the “Pagliano Server”) to the new server (which the FBI will call the “PRN Server”) in late June 2013, leaving the old server mostly empty but still running. On August 12, 2015, the FBI only picked up the old server for analysis.
A September 2016 FBI report will explain, “At the time of the FBI’s acquisition of the Pagliano Server, Williams & Connolly [the law firm of Clinton’s personal lawyer David Kendall] did not advise the US government of the existence of the additional equipment associated with the Pagliano Server, or that Clinton’s clintonemail.com emails had been migrated to the successor PRN Server remaining at Equinix. The FBI’s subsequent investigation identified this additional equipment and revealed the email migration.”
The report will continue, “As a result, on October 3, 2015, the FBI obtained, via consent provided by Clinton through Williams & Connolly, both the remaining Pagliano Server equipment and the PRN Server, which had remained operational and was hosting Clinton’s personal email account until it was disconnected and produced to the FBI.” (Federal Bureau of Investigation, 9/2/2016)