6 Things to Know About the Synology DS1621+ NAS

Six internal bays come standard This puts it ahead of typical 4-bay desktop NAS models for storage capacity.

Expandable to 16 bays Synology’s DX517 expansion units let you add up to 10 more drives, giving room for growing media libraries or long-term backup archives.

Designed for continuous growth The expansion path suits users who need to scale storage over multiple years without replacing the main unit.

Supports both HDDs and SSDs You can mix drive types to balance speed and capacity, though SSDs are optional for most home or small office use.

Not for casual users The DS1621+ is overkill if you only need a few terabytes for basic file sharing or backups.

Requires compatible expansion units Only Synology’s DX517 works for adding bays, so plan your expansion budget accordingly.