QNAP TR-004 Review: 4-Bay USB-C Hardware RAID Enclosure

4.2/5
Budget

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QNAP TR-004 4-Bay USB-C RAID Enclosure
★★★★ ☆
4.2/5
💰
Budget
Under $300

⚡ Key Specifications

  • ▸ 4-Bay SATA 3.5"/2.5" (Hot-swap)
  • ▸ USB 3.2 Gen 1 Type-C (5Gbps)
  • ▸ Hardware RAID (0/1/5/10, JBOD)
  • ▸ DIP Switch or Software Control
  • ▸ Works with QNAP NAS, Windows, macOS, Linux
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QNAP TR-004 at a glance

The QNAP TR-004 fills a specific niche: it’s a 4-bay Direct Attached Storage (DAS) enclosure that handles RAID logic itself. Unlike a “dumb” USB box that relies on your computer’s CPU for software RAID, the TR-004 has its own controller. You can set RAID modes (0, 1, 5, 10, JBOD) via physical DIP switches on the rear or use the QNAP External RAID Manager software.

It serves two main audiences:

  1. QNAP NAS owners who need more drive bays but don’t want to buy a new server (it plugs into your existing NAS USB port).
  2. PC/Mac users who want a reliable, hardware-RAID protected external drive for large backups, media libraries, or Chia farming.

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Drive Bays
4 × 3.5"/2.5" SATA 3Gb/s (Hot-swappable)
SPEC #1
Interface
USB 3.2 Gen 1 Type-C (5Gbps)
SPEC #2
RAID Modes
Hardware RAID 0, 1, 5, 10, JBOD, Individual
SPEC #3
Controller
Microprocessor with hardware RAID support
SPEC #4
Dimensions
168.5 × 160.2 × 219 mm
SPEC #5
Fan
1 × 120mm smart fan (12V DC)
SPEC #6
Compatibility
QNAP NAS (QTS), Windows, macOS, Linux
SPEC #7
In the Box
TR-004 Unit, USB-C to USB-A cable, Power Adapter, Keys, Screws
SPEC #8

Hardware RAID vs. Software RAID

The standout feature of the TR-004 is hardware RAID.

  • DBS (Dip Switch Mode): You can configure the array type solely by toggling switches on the back of the unit. This is OS-agnostic—your computer just sees a single massive USB drive.
  • Software Control: Alternatively, install the QNAP External RAID Manager (Windows/macOS) to view drive health, update firmware, and configure RAID groups visually.

This flexibility makes it safer than typical cheap USB enclosures, as the RAID logic is independent of your OS glitches.

Performance: The 5Gbps Bottleneck

While typical 4-bay NAS units run over 1Gbps (110 MB/s) or 2.5Gbps networks, the USB 3.2 Gen 1 connection here offers a theoretical dashboard of 5Gbps.

In real-world terms, a RAID 5 array of hard drives in the TR-004 typically sustains 200–240 MB/s read/write speeds. This is faster than Gigabit Ethernet but slower than 10Gbps DAS units. It acts as a bottleneck if you populate it with SATA SSDs—you will not get the full speed of 4 SSDs. For spinning HDDs, however, the 5Gbps pipe is perfectly adequate for backups and media storage.

Use Case: Expanding a QNAP NAS

If you own a QNAP NAS (like a TS-464), you can plug the TR-004 into its USB port. QTS recognizes it as an external expansion unit. You can use it to:

  • Create a storage pool and volume (just like internal drives).
  • Back up your main NAS to the TR-004 (using Hybrid Backup Sync).

Limitation: You typically cannot span a single volume across your main NAS and the TR-004. It effectively acts as a separate “Storage Pool 2”.

Risks and Reliability

Buying a DAS is often about reliability. Here is what real users report:

  • USB Disconnects: Some Windows users report the device occasionally dropping connection (“USB device not recognized”). This is often resolved by power cycling but suggests sensitivity to USB controllers or cables.
  • Mode Switching Data Loss: WARNING: Changing the RAID mode (via switches or software) initiates a re-partitioning that wipes all data. Do not touch the switches once your data is live.
  • Mixed Drive Types: You strictly cannot mix HDDs and SSDs in the same RAID group.

What do users say?

We analyzed user feedback to see how the TR-004 holds up in the wild.

👍 Zagarm (Reddit)

"I was pleasantly suprised to find that the QNAP External Raid Manager will happily show all array details, even though the DAS isn't running in Software Mode. I'd call that a win !"

👍 realbugs (Reddit)

"Basically works like a charm. I own two. If whatever you’re connecting to understands usb disks it will work."

ℹ️ Vollare (Reddit)

"'Software control mode' just means, you will be able to configure the RAID modes (or non-RAID mode) with the Qnap External RAID Manager software. Otherwise you are stuck with the dipswitches at the back of the NAS and whatever mode you have set there is final (meaning: if you change that the drives will be wiped)."

⚠️ Curious-Mola-2024 (Reddit)

"The TR-004 is cool except for usb 3.0 gen 1 only 5Gbps. If you aren't going to use the built in raid controller I recommend looking for a different enclosure with at least USB gen2 support 10Gbps."

⚠️ snoopdoge90 (Reddit)

"It disconnects randomly and Windows says USB device not recognized. Sometimes a power cycle fixes it, but reliability is a concern for a backup device."

ℹ️ data_hoarder_99 (Reddit)

"It's fine for cold storage or backups, but don't expect to run VMs off it. The 5Gbps interface and SATA bottleneck mean it's not fast enough for active workloads."

Pros and Cons

Verdict

The QNAP TR-004 is a reliable workhorse for “slow and steady” bulk storage. It is not built for speed—do not buy this for editing 8K video from SSDs. However, as a hardware-RAID backup target or a capacity extender for a QNAP NAS, it offers excellent value and data safety features that cheap USB docks lack.

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