---
product_id: 210762336
title: "QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black"
brand: "qnap"
price: "$1290.01"
currency: USD
in_stock: true
reviews_count: 13
category: "Qnap"
url: https://www.desertcart.us/products/210762336-qnap-tr-004u-4-bay-rackmount-nas-expansion-optional-use
store_origin: US
region: United States of America
---

# USB 3.2 Gen 1 Type-C for blazing fast transfers Supports 4 SATA drives for massive storage expansion Lockable trays for secure, accidental-removal-proof drives QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black

**Brand:** qnap
**Price:** $1290.01
**Availability:** ✅ In Stock

## Summary

> 🚀 Unlock next-level storage power and security with QNAP TR-004U — your data’s new best friend.

## Quick Answers

- **What is this?** QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black by qnap
- **How much does it cost?** $1290.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/210762336-qnap-tr-004u-4-bay-rackmount-nas-expansion-optional-use)

## Best For

- qnap enthusiasts

## Why This Product

- Trusted qnap brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quad-Bay SATA Expansion:** Scale your storage effortlessly with support for up to four 3.5-inch SATA drives, perfect for heavy-duty data needs.
- • **Secure Lockable Drive Trays:** Keep your drives safe and secure with lockable trays that prevent accidental removal—ideal for busy office environments.
- • **Flexible RAID Configurations:** Customize your data protection and performance with easy hardware/software RAID mode switching.
- • **Intuitive Storage Management:** Monitor disk health and configure RAID effortlessly via QNAP’s Storage & Snapshots Manager for total control.
- • **Blazing Fast USB 3.2 Gen 1 Type-C:** Experience seamless, high-speed data transfers that keep your workflow uninterrupted.

## Overview

The QNAP TR-004U is a versatile 4-bay rackmount NAS expansion enclosure featuring USB 3.2 Gen 1 Type-C connectivity for fast data transfer. It supports up to four 3.5-inch SATA drives with flexible RAID options, lockable trays for drive security, and can be used as a direct-attached storage device or NAS expansion. Designed for professionals seeking reliable, scalable, and secure storage solutions, it integrates seamlessly with QNAP NAS systems via Storage & Snapshots Manager.

## Description

Product Description The TR-004U USB 3.2 Gen 1 RAID expansion enclosure allows you to expand the capacity of your QNAP NAS and PC. The TR-004U can also be utilized as a DAS (Direct-attached Storage) device, allowing you to directly access its content by connecting it via USB. The TR-004U features four 3.5-inch SATA drive bays with multiple RAID configuration options and USB 3.2 Gen 1 Type-C connectivity to bring you a highly-reliable and secure storage capacity expansion solution. Legal Disclaimer Product is sourced and shipped from the European Economic Area (EEA). Product is genuine original from manufacturer authorized distributors.

Review: Great choice for home storage - I read far too many online reviews before picking this drive bay and I’m really happy so far with choosing this one. I wanted a USB connected solution rather than a NAS as it means everything can be remotely backed up via Backblaze. I have the drives connected to an M4 Mac Mini and everything is working really well.
Review: Useless. Totally useless - I bought this to extend an existing QNAP NAS and I wish I'd never bothered. It's possible to get it to interact with the NAS after endless tinkering but as soon as you restart the NAS, it's almost impossible to get this to reconnect. Eventually after rebooting both devices in different orders, one might be lucky enough for the RAID to reconnect, but it takes far, far longer than it should. Additionally, you can't extent the device once you install it. I bought this with 2 drives, planning to add 2 more later. Doesn't work. This is the single worst tech device I've ever bought.

## Features

- USB 3.2 Gen 1 Type-C port* for faster data transfer.
- Supports up to four SATA drives for reliable read and write performance.
- Disk mode DIP switch to change from Hardware Control and Software Control configurations for setting RAID group.
- Lockable hard drive trays to prevent accidental drive removal.
- Users can configure RAID and monitor disk health using Storage & Snapshots Manager on a QNAP NAS.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SMB9BLG |
| Best Sellers Rank | 56,571 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 34 in Network Attached Storage (NAS) Devices |
| Box Contents | 1 piece |
| Brand | QNAP |
| Brand Name | QNAP |
| Colour | Black |
| Compatible Devices | Server |
| Compatible devices | Server |
| Country of Origin | Taiwan |
| Customer Reviews | 4.1 out of 5 stars 518 Reviews |
| Enclosure Material | Pn |
| Global Trade Identification Number | 04713213515778 |
| Is Assembly Required | Yes |
| Item Dimensions D x W x H | 54D x 42W x 20H centimetres |
| Item Type Name | Other NAS Server Options |
| Item Weight | 2 Kilograms |
| Manufacturer | QNAP |
| Manufacturer Part Number | TR-004U |
| Material | Pn |
| Model Number | TR-004U |
| Mounting Type | Rack Mount |
| Product Warranty | 2 year manufacturer |
| Product dimensions | 54D x 42W x 20H centimetres |
| Size | 4 Bay |
| Unit Count | 1.00 count |

## Product Details

- **Brand:** QNAP
- **Colour:** Black
- **Material:** Pn
- **Product dimensions:** 54D x 42W x 20H centimetres
- **Size:** 4 Bay

## Images

![QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black - Image 1](https://m.media-amazon.com/images/I/517yLo1i17L.jpg)
![QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black - Image 2](https://m.media-amazon.com/images/I/51RiK2g3mFL.jpg)
![QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black - Image 3](https://m.media-amazon.com/images/I/61FiCi-TV-L.jpg)
![QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black - Image 4](https://m.media-amazon.com/images/I/611A3WVmi3L.jpg)
![QNAP TR-004U 4 Bay Rackmount NAS Expansion - Optional Use as a Direct-Attached Storage Device,Black - Image 5](https://m.media-amazon.com/images/I/71beVe4HzCL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great choice for home storage
*by M***H on 11 July 2025*

I read far too many online reviews before picking this drive bay and I’m really happy so far with choosing this one. I wanted a USB connected solution rather than a NAS as it means everything can be remotely backed up via Backblaze. I have the drives connected to an M4 Mac Mini and everything is working really well.

### ⭐⭐⭐⭐⭐ Useless. Totally useless
*by R***T on 16 November 2023*

I bought this to extend an existing QNAP NAS and I wish I'd never bothered. It's possible to get it to interact with the NAS after endless tinkering but as soon as you restart the NAS, it's almost impossible to get this to reconnect. Eventually after rebooting both devices in different orders, one might be lucky enough for the RAID to reconnect, but it takes far, far longer than it should. Additionally, you can't extent the device once you install it. I bought this with 2 drives, planning to add 2 more later. Doesn't work. This is the single worst tech device I've ever bought.

### ⭐⭐⭐⭐ Cheap way of building a hardware RAID
*by M***T on 6 November 2022*

This is sold as an expansion caddy for a QNAP NAS – but I'm using it as directly attached storage for my home server. It functions perfectly well as an external caddy, and provides a little more functionality than a standard 4-bay external caddy, at a price that's competitive with other reputable brands. The Interface is USB-C, so it's pretty straightforward to connect to a PC or Mac. There are dip-switches on the back that allows the user to select between RAID 0, RAID 1 and RAID 10 – or leave the caddy in JBOD mode, so your computer recognises individual disks inside. I was a little wary of this – assuming one false move with the dip-switches would wipe everything – but after moving the switches, you still have to press and hold a button before anything useful/calamitous can happen. The buttons and switches are nice and sturdy, so there's no danger of doing anything accidentally. There's a big 120mm fan on this, which means it turns a little slower and runs a little quieter than on units with an 80mm equivalent. It's doing a good job of keeping everything cool. Running with minimal load, the 4x12TB WD CMR drives I have inside are running at 35°C for slots one and four, and 37°C for two and three. Setup as RAID 0, when copying 32TB of data to the drive, temperatures peaked at 55°C (S.M.A.R.T status) is viewable through the QNAP external RAID Manager software that comes with the device. I've had not particular problems with that. It did have a crazy day of going off-line in 12-second bursts four or five times. Can't figure out what caused that, may have been nothing to do with the unit – but it's been up now for two months and, that day apart, has ran like a sewing machine. Speed-wise, it doesn't seem to be particularly quicker than using a software RAID system like SoftRAID. My files copied at around 7GB per minute, which is what I'd expect from a JBOD caddy – but the Mac Mini to which this is attached seems much more spritely with this Hardware RAID attached than it did running a software RAID. So, overall, I'm very happy with the purchase.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-06-05*