Synology expansion unit rx1217rx1217rp delivers an effortless solution for data volume expansion and data backup for synology 2u rackstation nas with additional 12 drive bays rx1217rx1217rp seamlessly expands the storage capacity of the connected synology nas on the fly volume expansion amp backup when running out of storage capacity on the synology 2u rackstation1 synology rx1217rx1217rp provides an easy way to immediately scale capacity by additional 12 drives the raid volume on the