Home / Computers / How many bays can the DS423+ support with an optional expansion unit?Computers Technology ramseeker nasHow many bays can the DS423+ support with an optional expansion unit?The DS423+ goes from 4 to 9 bays with an optional DX517, which adds 5 more bays via eSATA. Search Amazon As an Amazon Associate I earn from qualifying purchases.Related NotesExploreExploreExplorePrevious How many drive bays does the Synology DS1823xs+ support?Next How long does the Eufy G30 Edge run on a single charge?