Frequently Asked Question

Synology expansion units are designed for pairing with specific expansion-ready DiskStation/RackStation/NVR models to enlarge the internal volume, or form independent volumes for backup or additional storage. Refer to the table below to see which DiskStation/RackStation/NVR are designed to support expansion units:

Expansion Unit	Models
RX1216sas	RS18016xs+
RXD1215sas	RC18015xs+
RX1214(RP)	RS3614xs+, RS3614(RP)xs, RS2416(RP)+, RS2414(RP)+, RS3413xs+, RS3412(RP)xs, RS3411(RP)xs, RS2212(RP)+, RS2211(RP)+
RX1213sas	RS10613xs+
RX1211(RP)	RS3413xs+, RS3412(RP)xs, RS3411(RP)xs, RS2212(RP)+, RS2211(RP)+
RX415	RS815(RP)+, RS814(RP)+, RS815, RS814, RS812(RP)+, RS812
	Independent volumes only: RS214
RX410	RS814(RP)+, RS814, RS812(RP)+, RS812, RS810(RP)+
DX1215	DS3615xs, DS2015xs, DS3612xs, DS3611xs, DS2415+, DS2413+, DS2411+
DX1211	DS3612xs, DS3611xs, DS2413+, DS2411+
DX513/DX213	DS1815+, DS1813+, DS1812+, DS1515+, DS1515, DS1513+, DS1512+, DS1511+, DS1010+, DS716+, DS715, DS713+, DS712+, DS710+; NVR216 (DX213 only)
	Independent volumes only: DS415+, DS413, DS412+, DS215+, DS214+, DS214play, DS213+, DS212+, DS115, DS114, DS112+, DS112
DX510	DS1813+, DS1812+, DS1513+, DS1512+, DS1511+, DS1010+, DS713+, DS712+, DS710+

Expansion units may be able to automatically power-on or off alongside paired Synology products. However, expansion units and paired DiskStation/RackStation/NVR must be connected using the original cable provided by Synology Inc.; otherwise automatic power-on/off may not function as normal.