Choosing NAS storage & drives often comes down to a practical fork: pay more for a clearly specified enclosure, or spend less on a server-oriented unit and match its listed hardware to your plan. The Synology DS423 and Qnap TS-451U both need separate drive planning, but their descriptions point to different buying priorities.
Quick verdict
Synology DS423 is the stronger fit for shoppers prioritizing explicit four-bay, HDD, Ethernet, and PC-compatibility details. Qnap TS-451U is the price-first choice, with a listed price of USD 249.99 versus USD 350.00 for Synology. Neither includes drives, so the purchase is a starting point for a storage build rather than a complete array.
At-a-glance comparison
| Product | Listed price | Key listed details |
|---|---|---|
| Synology DS423 | USD 350.00 | 4 bays; HDD support; Ethernet interface; PC compatibility |
| Qnap TS-451U | USD 249.99 | 4-LFF; server type |
Where each product wins
Synology DS423 wins when explicit enclosure and connectivity attributes are the deciding filter. Its 4 bays, HDD support, Ethernet interface, and PC compatibility are clearly named, making it the more direct match for shoppers screening by those requirements.
Qnap TS-451U wins on the listed-price spread. The $100.01 difference favors the Qnap, and its title supplies a specific model with server-oriented hardware wording. Choose it when that lower entry point matters more than Synology's explicitly stated connectivity profile.
Product notes
Synology DS423
The Synology DS423 earns its place for shoppers who want a named enclosure format and a simple physical match point. Its title identifies the DS423 and the Network Attached Storage Enclosure format, while the listed black color can suit a home setup where finish matters. The limitation is its used condition, with small imperfections such as scratches identified as possible cosmetic wear. That makes cosmetic condition part of the choice, especially for shoppers who want a cleaner-looking unit. Choose it when the DS423 enclosure identity and black finish are useful fit points, and cosmetic wear is acceptable.
Qnap TS-451U
The Qnap TS-451U suits shoppers who want a specific model to anchor a planned home NAS build. Its title names the TS-451U and Network Attached Storage NAS format, and it also states a J1800 2.41GHz CPU and 1GB RAM. That wording gives concrete hardware markers to compare with an intended setup. The limitation is its used condition, so prior use is part of the purchasing decision. The lower-priced unit still requires separate drive planning, making the upfront figure only one part of the overall setup. Choose Qnap when the TS-451U model wording and stated hardware are the right match.
Final choice by use case
- Choose Synology DS423 for: the shopper for whom the DS423 name and black finish are the deciding fit points, with the higher listed price accepted.
- Choose Qnap TS-451U for: the shopper who prioritizes the lower listed price and wants the title's specific model and hardware wording to guide the build.
- For either choice: plan the NAS around separate drive selection, since neither unit includes drives.
