QNAP TR-002-24W-US 4TB 2-Bay USB 3.2 Gen 2 DAS — main product image

QNAP TR-002-24W-US 4TB 2-Bay USB 3.2 Gen 2 DAS

QNAP

QNAP TR-002-24W-US 4TB 2-Bay USB 3.2 Gen 2 DAS

Name: QNAP TR-002-24W-US 4TB 2-Bay USB 3.2 Gen 2 DAS
Brand: QNAP
SKU: TR-002-24W-US

★★★★★4.4 (44 reviews)

24WUSB 3.2

Hardware RAID 1 and USB 3.2 Gen 2 at 10Gbps give this 4TB DAS real redundancy at desktop speeds.

$329.00*

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The QNAP TR-002-24W-US is a 2-bay direct-attached storage enclosure shipped with 4TB of capacity — two 2TB WD Red Plus HDDs pre-installed and pre-configured in RAID 1. The hardware RAID controller is the defining feature here: RAID logic is processed entirely within the enclosure, which means the host system sees a simple USB storage volume with zero RAID overhead on the CPU or OS. The USB 3.2 Gen 2 interface runs at 10Gbps, which is the correct bus for serious workloads — though at RAID 1 with spinning drives, sequential throughput will plateau around 150–200 MB/s, consistent with WD Red Plus performance characteristics rather than any bus-side limitation.

The TR-002 is built for professionals who need immediate data redundancy without NAS complexity — video editors who want a mirrored backup drive on a workstation, photographers archiving raw files, or small offices protecting critical working documents. Its dual-mode capability — standalone DAS or QNAP NAS expansion — is a genuine long-term value proposition: the same unit can serve a desktop today and extend a rack-mounted QNAP NAS tomorrow. Lockable drive bays protect against accidental drive removal in shared spaces. For users who find the HDD throughput limiting, the enclosure accepts standard 3.5-inch drives, meaning an SSD upgrade path exists within the same chassis.

Key Features

4TB WD Red Plus drives pre-installed and pre-configured with RAID 1

High-speed direct-attached storage device via USB Type-C for Windows, macOS and Linux

TR-002 can be used as a DAS for external storage mode. Optional to use either the NAS expansion storage mode or the external storage mode.

Expand the capacity of your QNAP NAS. Use TR-002 instead of a conventional NAS expansion unit.

Hardware RAID supports RAID 0, 1, JBOD, and individual disks

Includes a USB Type-C to USB 3.2 Gen2 cable

Lockable drive Bays

Specifications

Capacity

4TB

Drive Bays

2-Bay

Pre-installed Drives

WD Red Plus

RAID Configuration

RAID 1 (pre-configured)

Connectivity

USB 3.2 Gen 2 Type-C

Operating System Compatibility

Windows, macOS, Linux

Usage Modes

DAS (Direct-Attached Storage), NAS Expansion Storage

Hardware RAID Support

RAID 0, 1, JBOD, Individual Disks

Drive Bay Security

Lockable

Included Cables

USB Type-C to USB 3.2 Gen2 cable

Pros & Cons

👍 Pros

Hardware RAID controller handles RAID logic independently — no CPU overhead on the host machine, no software RAID fragility
USB 3.2 Gen 2 at 10Gbps eliminates the USB 3.0 (5Gbps) bottleneck that throttles competing DAS units on high-throughput workflows
Ships pre-configured in RAID 1 — immediate data redundancy with zero setup time
Dual-mode operation (standalone DAS or QNAP NAS expansion) gives this unit long-term flexibility in evolving storage architectures
Lockable drive bays add a physical security layer in shared office or studio environments

👎 Cons

With spinning WD Red Plus HDDs, real-world throughput tops out around 150–200 MB/s — the 10Gbps bus is never the bottleneck, the drives are
RAID 1 cuts usable capacity in half — 4TB raw delivers only 2TB of protected storage
No network interface — this is strictly a directly attached device; a single host owns it at a time
Changing RAID modes requires wiping the array — no non-destructive RAID migration path
HDD-based storage generates audible seek noise; not silent in quiet editing or home office environments

Frequently Asked Questions

What real-world transfer speeds does the TR-002 achieve over USB 3.2 Gen 2?

The USB 3.2 Gen 2 interface has a theoretical ceiling of 10Gbps. In practice, sequential read/write speeds with this two-bay RAID 1 configuration are bottlenecked by the HDD spindle speed — expect 150–200 MB/s in real-world transfers, which is consistent with WD Red Plus performance rather than the USB bus limit.

Can I change the RAID configuration from RAID 1 to RAID 0 after purchase?

Yes, the TR-002 uses a hardware RAID controller with a physical switch supporting RAID 0, RAID 1, JBOD, and individual disk modes. Changing the RAID mode will destroy existing data — backup before reconfiguring.

Does this unit require any drivers, or does it appear as a native volume?

In DAS (external storage) mode, the TR-002 presents as a standard USB storage device on Windows, macOS, and Linux — no drivers required. The hardware RAID controller handles all RAID logic independently, so the host OS sees a single logical volume.

Can the TR-002 function as a NAS expansion unit rather than a standalone DAS?

Yes. The TR-002 supports two operating modes: standalone DAS via USB, and NAS expansion mode when connected to a compatible QNAP NAS. Switching modes allows it to extend a NAS's storage pool rather than operating independently.

Are the drive bays tool-free, and can I replace the included WD Red Plus drives?

The bays are lockable for security, and the 3.5-inch drive slots are accessible for drive replacement or upgrade. The included drives are WD Red Plus, which are rated for NAS and always-on workloads.