Quick verdict
Choosing the right setup for NAS storage & drives means resolving a format-and-cost question: is a lower-priced NAS device enough, or does a more specifically described server configuration better match the plan? Seagate is the cost-led choice for the former; Qnap is the specification-led choice for the latter, with its hard-drive situation considered up front.
| Product | Listed price | Condition |
|---|---|---|
| Seagate BlackArmor NAS 400 series | $39.00 | Used |
| Qnap TS-451U | $249.99 | Used |
Both carry the same Used condition, so condition does not separate the choice.
Where each product wins
Seagate wins on upfront spend. Its $39.00 price sits $210.99 below Qnap's $249.99 price. That is a concrete gap, not a claim about performance, making Seagate the natural direction for shoppers whose first filter is purchase cost.
Qnap wins on configuration detail. The TS-451U title specifies 4-LFF, a J1800 2.41GHz CPU, and 1GB RAM. These are useful selection cues for someone comparing a named server configuration, but the numbers themselves should be treated as specifications rather than automatic proof of superiority.
Product notes
Seagate BlackArmor NAS 400 series
The Seagate BlackArmor NAS 400 series is a practical match for a shopper who wants a clearly named NAS device. Its title makes the network-attached-storage purpose explicit, while the product is categorized as an External Drive. That gives it a defined role for a setup centered on centralized storage rather than a specifically identified server unit. The concrete limitation is the Used condition, plus the External Drive classification may not suit someone whose brief calls for a server. Choose it when the NAS-device description and lower purchase price align with your plan; move to Qnap when the named server format is the priority.
Qnap TS-451U
The Qnap TS-451U is aimed at shoppers who want a more detailed hardware description before choosing a NAS server. Its title names a J1800 2.41GHz CPU and 1GB RAM, giving this side of the comparison concrete specifications to weigh. Those numbers are descriptions, not a promise that the unit will outperform Seagate, but they do make the model easier to distinguish. The key limitation is explicit: No HDD is included, so the purchase does not include a hard-drive bundle. It is marked Used as well. Pick Qnap when its named configuration fits your plan; Seagate is the cleaner choice when a NAS device with an External Drive classification is enough.
Final choice by use case
- Choose Seagate BlackArmor NAS 400 series for a lower-cost NAS-device plan where its External Drive classification suits the setup.
- Choose Qnap TS-451U for a model-specific build where the 4-LFF wording and No HDD arrangement fit the plan.
The short version: Seagate answers the price-first brief; Qnap answers the configuration-first brief. Neither is a universal winner-the deciding detail is whether the NAS-device description or the named configuration better matches the way you intend to use NAS storage & drives.
