Choosing NAS storage & drives is really a setup decision: do you want a unit described with storage already in place, or a lower-priced unit that starts without a hard drive? The QNAP TS-809 Pro and Qnap TS-451U point to different starting points. Focus first on the configuration and included storage, then use the price difference as the tie-breaker.
Quick verdict
The QNAP TS-809 Pro is the fit when its broader configuration matches your plan, while the Qnap TS-451U is the straightforward choice when keeping the listed price lower matters more. The absolute listed-price spread is $47.50: the TS-809 Pro is USD 297.49, and the TS-451U is USD 249.99. Both are marked used, so the decision should come from the specific hardware details rather than an assumed performance advantage.
Compact comparison
| Detail | QNAP TS-809 Pro | Qnap TS-451U |
|---|---|---|
| Listed price | USD 297.49 | USD 249.99 |
| Model | TS-809 Pro | TS-451U |
| Type | Desktop External HDD | Server |
| Condition | Used | Used |
Where each product wins
- QNAP TS-809 Pro: The title's 8 bay wording and iSCSI target server description make it the more relevant choice when those specific capabilities and capacity planning terms match your use case.
- Qnap TS-451U: Its title clearly identifies a 4-LFF configuration with a J1800 2.41GHz CPU and 1GB RAM, giving you defined hardware parameters to compare with your planned setup.
Product notes
QNAP TS-809 Pro
The clearest reason to choose the QNAP TS-809 Pro is its described installed storage: the product description states that a 128GB SSD is installed in bay 1 and will ship with the drive. That gives this NAS a different starting point from the TS-451U, which is explicitly described without a hard drive. The title also names an 8-bay tower, an iSCSI target server, and a Core 2 Duo 2.8, useful identifiers when matching the unit to a specific network-storage plan. The practical limitation is the missing accessory: the description says the power cord is not included, although it identifies the required cord as a standard desktop-PC type. Choose this model when its installed SSD and eight-bay configuration justify the higher listed price.
Qnap TS-451U
The Qnap TS-451U makes sense for shoppers who want a clearly specified four-LFF configuration at the lower listed price. Its title identifies a J1800 2.41GHz CPU, 1GB RAM, and no HDD, while the description also says that no hard drive is included. That is the key limitation: storage is a separate part of the setup, unlike the TS-809 Pro's described 128GB SSD in bay 1. The concrete reason to choose it is the combination of the TS-451U model, 4-LFF format, and stated CPU and RAM details, especially when those parameters fit your plan. Pick it when the lower initial price matters more than receiving a unit described with a drive already installed.
Final choice by use case
- Choose QNAP TS-809 Pro for an eight-bay requirement or when the title's iSCSI target-server wording is central to your decision. Its described installed 128GB SSD is another reason to favor it, but budget for the missing power cord.
- Choose Qnap TS-451U when the four-LFF configuration and J1800/1GB specification fit your intended setup and you plan to source storage separately.
- Choose the lower-priced route if the $47.50 spread is decisive: that points to the TS-451U. Choose the TS-809 Pro when its specific configuration matters enough to warrant the higher listed price.
