Highlight plug and use design for seamless storage space upgrade online volume expansion 12 inch depth to fit in 2 post racks amp wall mount racks energy saving deep sleep mode managed from synology diskstation manager dsm volume expansion amp backup 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