The Asustor Nimbustor 4 (AS5304T) doubles down on 2.5GbE with link aggregation

The Nimbustor 4 steps up from the AS5202T by keeping the same dual 2.5GbE layout but adding explicit support for link aggregation and failover. That means you can bond both ports together for a 5GbE pipe to your switch, or let one port take over if the other drops — practical for a four-bay NAS that might serve multiple workstations.