Synology RX418 4bay Expansion Unit 44 mm drops to $539.99

Pick this up and save $10.

Need to scale your NAS storage without replacing your existing setup? The Synology RX418 expansion unit is the straightforward answer for anyone running a compatible DiskStation who needs more drive bays.

Synology RX418 4bay Expansion Unit 44 mm drops to $539.99 - save $10. This 2% discount brings it below the $559.76 average we have tracked over the last 30 days, making now a smart time to buy if you have been watching this accessory.

THE DEAL

Synology RX418 4bay Expansion Unit 44 mm

$539.99 (was $549.99) - Save $10 (2% off)

WhereAmazon

ExpiresNo end date listed

Get This Deal

This price sits $10 below the standard list price of $549.99 and undercuts the 30-day average of $559.76 by roughly $20. Over the past 90 days, the average has hovered around $559.91, so this is one of the better entry points we have seen for this expansion unit outside of any major sales cycle.

What You're Getting

The RX418 is a 4-bay expansion unit designed to pair with compatible Synology DiskStation models. It uses a plug-and-play setup that adds four additional drive bays without requiring a full migration or rebuild.

Key features include online volume expansion so your existing storage pool grows without downtime, a compact 12-inch depth that fits 2-post racks and wall-mount racks, an energy-saving deep sleep mode for idle drives, and full management through Synology DiskStation Manager (DSM). The unit ships diskless, so you load your own drives.

Who This Is For

This is for existing Synology NAS owners who have maxed out their current drive bays and need to add capacity without swapping hardware. It is also a fit for anyone running a home lab or small-office setup who wants rack-mountable expansion that stays managed from the same DSM interface.

If you do not already own a compatible Synology NAS, this unit will not work on its own, you need a host DiskStation first.

Final Verdict

At $539.99, the RX418 is priced $20 under its recent average and saves you $10 off list. If your DiskStation is running low on space and you want the simplest expansion path Synology offers. This is a solid price to lock in now.