Choosing NAS storage & drives starts with a practical fork: do you want a new enclosure for a PC-centered setup, or a lower-priced rackmount server with more bays but used condition and no drives or caddies? The Synology DS423 and QNAP TS-809U answer that differently. The useful shortcut is deciding whether enclosure condition and everyday connectivity matter more than bay count and upfront price.
Quick verdict
The Synology DS423 is the more direct pick for shoppers seeking a new, sealed NAS enclosure with PC compatibility, Ethernet connectivity, and a defined four-bay layout. The QNAP TS-809U fits a different brief: its rackmount chassis and eight-bay design are paired with a used condition and explicit no-HDD, no-caddy wording. The QNAP is listed $104.24 lower, but that price difference comes with a different starting point. Both require you to plan for storage drives separately.
Listed-price and feature comparison
| Product | Listed price | Format and bays | Key condition or drive detail |
|---|---|---|---|
| Synology DS423 | USD 374.99 | NAS enclosure, 4 bays | New; diskless |
| QNAP TS-809U | USD 270.75 | 2U rackmount NAS, 8 bays | Used; no HDDs or caddies |
Where each NAS wins
Synology DS423
Synology wins for a new enclosure with a clearly defined connectivity package. Its listing specifies PC compatibility, 2.5- and 3.5-inch form factors, two Gigabit Ethernet ports, and two USB-A 3 connections. That combination makes it easier to match with a home NAS plan centered on ordinary PC access and external connections. The trade-off is that the enclosure is diskless and has four bays, so shoppers prioritizing a larger chassis should look closely at the QNAP instead.
QNAP TS-809U
QNAP wins when rackmount format and additional drive capacity take priority. The 2U chassis is a concrete distinction, and the listing also includes remote access and 1 GB of cache. Its used condition and no-HDD, no-caddy wording are important limitations rather than small footnotes. The lower listed price makes the QNAP worth considering when those constraints fit the plan, but it is not the same type of starting point as a new enclosure.
Product notes
Synology DS423
Synology DS423 is the one to choose when a new, sealed enclosure and straightforward PC compatibility are the priority. The two Gigabit Ethernet ports and two USB-A 3 connections give it a defined connectivity package, while the listed 2.5- and 3.5-inch form factor identifies the drive sizes associated with the unit. The limitation is equally clear: it is described as diskless, so hard drives are a separate part of the purchase. At USD 374.99, it also sits $104.24 above the QNAP. That combination makes the DS423 an enclosure-first choice rather than the lower-cost route into NAS hardware.
QNAP TS-809U
QNAP TS-809U earns its place for shoppers who specifically want a rackmount chassis and the larger bay count named in its title. Remote access and the 1 GB cache entry add useful decision points beyond the chassis itself. The limitation is explicit: the title says "No HDDs No Caddies," and the condition is used. Those details mean the USD 270.75 price covers a different starting point from Synology's new enclosure. Pick QNAP when rack-oriented hardware, eight bays, and the lower listed price outweigh the need to source drives and caddies separately; choose Synology when used condition or missing accessories conflicts with the setup.
Final choice by use case
Choose Synology DS423 if you want a new, sealed enclosure for PC use and prefer its Ethernet and USB connectivity, accepting a diskless setup and the higher listed price. Choose QNAP TS-809U if a 2U rackmount chassis, remote access, and the lower listed price fit your plan, and you are prepared for the no-HDD, no-caddy configuration and used condition. In short, Synology is the more straightforward enclosure purchase; QNAP is the rackmount-capacity choice when the missing components are acceptable.
