4 bay expansion unit increases capacity of 1u rackstation serversr synology rx415 delivers an effortless volume expansion and data backup solution for synologys 1u rackstation servers by providing an additional 4 drive slots with its new short depth chassis design rx415 ensures easy installation and deployment in 2 post racks and wall mount racksr volume expansion backupr when drive capacity is running low on a synology 1u rackstation synology rx415 provides an easy way to immediately sca