When drive capacity is running low on a synology 1u rackstation synology rx415 provides an easy way to immediately scale capacity by providing an additional 4 slots a raid volume on the synology rackstation can be expanded directly without having to reformat the existing drives ensuring the synology rackstation continues providing services during capacity expansion synology rx415 can serve as a dedicated local backup solution for a synology rackstation when created as a separate volume the