# UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure

The UGREEN 15976-40GB M.2 NVMe SSD enclosure is listed with a 40Gbps USB4 interface, aluminium housing and an automatically adjusted cooling fan. It is designed for M.2 NVMe drives up to 8TB, but the listing says PCIe 5.0 SSDs and drives with heatsinks are not supported.

- [Original product page](https://bargainpostbox.co.uk/product/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)
- [View offer](https://bargainpostbox.co.uk/visit/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: UGREEN
- Model: 15976-40GB
- Price: 59.96 GBP
- Previous price: 79.99 GBP
- Discount: 25%
- Price checked: 2026-11-14T09:50:54.206Z
- Rating: 3.8 / 5
- Reviews: 1251

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- USB4 connection is listed at up to 40Gbps, with compatibility claims for Thunderbolt 3 and 4.
- A built-in PWM fan is claimed to adjust its speed according to internal temperature.
- The listing specifies support for M.2 NVMe drives in four lengths, up to 8TB, with M Key or M&B Key.
- Aluminium housing and a thermal pad are intended to help transfer heat away from the SSD.

## Pros

- The stated 40Gbps interface and USB-C-to-USB-C cable make it a potential fit for compatible USB4 or Thunderbolt setups.
- The included fan and thermal pad provide active and passive heat-management features.
- Support for 2230, 2242, 2260 and 2280 SSD lengths offers flexibility when choosing a compatible drive.

## Cons

- It is not compatible with SSDs that have a heatsink or with M.2 PCIe 5.0 SSDs, according to the listing.
- A USB4 or Thunderbolt-capable host is needed to make use of the advertised interface speed.

## Specifications

### Identity
- Brand: UGREEN
- Model: 15976-40GB
### Interface and compatibility
- Hardware interface: Thunderbolt
- Listed data transfer rate: 40 Gigabits Per Second
- Listed network connectivity technology: SATA, USB
- Compatible devices: Laptops, Desktops, Mobile Devices
- Hardware platform: Universal
- Compatible SSD sizes: 2280/2260/2242/2230
- Maximum SSD capacity: 8TB
### Storage
- Storage listed: 8 TB
### Dimensions and installation
- Dimensions listed: 15L x 3W x 10H centimetres
- Weight listed: 0.2 Kilograms
### Materials and finish
- Enclosure material: Aluminium
- Colour: silver
### Features and support
- Advertised peak transfer speed: Up to 3700MB/s transfer speeds. Compatible with USB4 and Thunderbolt 4, MacBook M1, M2, M3, M4, Windows, Linux, UASP & TRIM
- Supported SSD key types: M Key or M&B Key
- Unsupported SSD types: Does not support SSD with heatsink and M.2 PCIE 5.0 SSD
- Warranty listed: 2 year manufacturer

## Before you buy

- The listing's 40Gbps interface claim and separate up-to-3700MB/s transfer-speed claim describe different measures. Actual speed depends on the SSD and host connection. It also lists Thunderbolt as the hardware interface while describing USB4 and Thunderbolt 3/4 compatibility. Confirm the interface and SSD compatibility details for your setup. The stated 8TB maximum appears both as a capacity claim and as a storage specification.

## In the box

- M.2 NVMe enclosure with cooling fan, quantity 1 (Included)
- External silicone case, quantity 1 (Included)
- Thermal pad, quantity 1 (Included)
- USB-C to USB-C cable, quantity 1 (Included)
- USB-C to USB-A cable, quantity 1 (Included)
- User manual ×1 (Included)
- Screwdriver, quantity 1 (Included)

## A good fit for

- Buyers adding a compatible M.2 NVMe SSD to a USB4 or Thunderbolt-capable laptop or desktop.
- People who want a portable external drive enclosure with a fan and thermal pad.
- Users seeking an enclosure for 2230, 2242, 2260 or 2280 M.2 NVMe drives.

## Less suited to

- Owners of M.2 PCIe 5.0 SSDs or SSDs fitted with heatsinks.
- Buyers who need the enclosure alone to provide storage, since the listing describes an SSD enclosure rather than an included SSD.

## Customer feedback

Customer feedback highlights perceived speed, build quality and appearance, while reports on overall performance are mixed. Heat and fan operation are concerns in some feedback, and views on noise vary. These comments matter for sustained transfers: although the listing claims a cooling fan and thermal pad, they do not ensure that the enclosure will stay cool, quiet or operate consistently in every setup.
- Positive themes: Customers praise perceived speed, build quality and appearance.
- Negative themes: Some customer feedback raises concerns about fan performance, including inconsistent operation.
- Mixed feedback: Reports of overall performance differ, with some describing reliable operation and others saying it did not work properly.
- Mixed feedback: Heat management and noise receive mixed feedback, including reports of excessive heat or shutdown and differing impressions of fan noise.

## Frequently asked questions

### Which SSDs does the UGREEN 15976-40GB support?
The listing specifies M.2 NVMe SSDs with M Key or M&B Key, in 2230, 2242, 2260 or 2280 lengths, up to 8TB. It excludes PCIe 5.0 SSDs and drives with heatsinks.
### Does it support USB4 and Thunderbolt?
The product title and feature claims describe USB4 and compatibility with Thunderbolt 3 and 4. The hardware-interface field says Thunderbolt, so confirm that description against the connection on your host device.
### Is the SSD included?
The supplied box list names the enclosure and accessories, but does not list an SSD. The product is presented as an enclosure for a separately supplied M.2 NVMe drive.
### What does the cooling fan do?
The listing says its PWM fan adjusts speed according to internal temperature, while the aluminium shell and thermal pad are intended to help dissipate heat. Customer feedback is mixed on heat and fan operation.

## Alternative options

- [Amazon Basics Thunderbolt4/USB4 Pro Docking Station,2xTBT4,1xHDMI2.1,3xUSB A 3.1,RJ45,Dual Display, Black, 7.86 x 2.95 x 1.23 inches](https://bargainpostbox.co.uk/visit/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)
- [Lexar EQ790 SSD, M.2 2280 PCIe Gen4 NVMe SSD, EQ790 2TB \| Up to 7,000MB/s Read, High-Performance Storage Internal Solid State Drive for AI Rendering, 4K Video Editing, PC & PS5 Gaming](https://bargainpostbox.co.uk/visit/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)
- [Amazon Basics USB4 Cable, USB-C to USB-C, 240W, 40Gbps, 1m, Thunderbolt 3/4 compatible, 8K Video, Fast Charge Cable, USB-IF Cert](https://bargainpostbox.co.uk/visit/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)
- [Samsung 990 PRO NVMe M.2 SSD, 4 TB, PCIe 4.0, 7,450 MB/s read, 6,900 MB/s write, Internal SSD, For gaming and video editing, MZ-V9P4T0BW](https://bargainpostbox.co.uk/visit/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)

## Add-ons

- [Crucial P310 2TB SSD M.2 2280 NVMe PCIe Gen4, Up to 7,100MB/s, Laptop & Desktop \(PC\) Compatible, Internal Solid State Drive - CT2000P310SSD801](https://bargainpostbox.co.uk/visit/ugreen-15976-40gb-usb4-nvme-ssd-enclosure)

## Images

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 1](https://bargainpostbox.co.uk/i/IYq2wJ-HJnh2OTF3o-9Q_QDKAZ0LACxRMwlOhVj_v3l0FZdy7vkLfY5iEou1u4BeQ7TlUXDB44cqoEGFPzvoGLGrjAkA6QCpUITrVtj_iB2CW2sdXU4qXQb-.jpg)

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 2](https://bargainpostbox.co.uk/i/tfUmJtNHyRqgOthlbw4q-9VaxDYSkqpg-m7MZz-k_UbWkj5VpEBBLWwUVhRyf-w8OlJa1D2sIT1ubKAjaDkzoXNz-H_GzBDVsjg2Piqec-9OvRqV0xLqwrql.jpg)

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 3](https://bargainpostbox.co.uk/i/shxd_VVlcMEZq576baoka1OzcDIoDXSEY7m2wARmcBuhj8GAXsKwRxtJx4u8LGR-xRwVLASuZToTi4oqIETavLhpMbtMNKRDMuml4OOP5dw3dxhCMWAmV7pX.jpg)

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 4](https://bargainpostbox.co.uk/i/-HvMld6qSvO3zKcL9iYNzxoHhTmoJKTKBZBKcm5bLL2EvafGcik6vghqEPPmRHzu_lWT229ttqwNj7g413BlyS82xnczOKdT60mg3oSZwVD_bDZ_HoOrwqkL.jpg)

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 5](https://bargainpostbox.co.uk/i/acIV2dzrMS0j1vT8Gpn3U5C4Cs3fcNPPme9U9eOP6-n0D_LKT-ztLXAKdr5HrhKFW6Gy-26JJ_lTjwrQMR-iBYiihCDlTxSm3wcBePmrofWlRHqQ-c6uTtbV.jpg)

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 6](https://bargainpostbox.co.uk/i/_fmN2z6o5hNCAKNMTE8M4kk6Q1xzR5lR4Qet17owHwxHQPOHIi3gzVtJcyaWETiN7o_0WF0VzWjZEntSSc4iR6mUEnjVnjiCioWJFkmmp_k4hTJe1ksNPc_r.jpg)

![UGREEN 15976-40GB 40Gbps USB4 M.2 NVMe SSD Enclosure — 7](https://bargainpostbox.co.uk/i/EzBIDLRS9p3K_rl0BnvgS_mTlc1jF4Ue-iBDuVw0m2JkvKnwAYmQOTR0PB8rPIydETpRr8oPtjZYjdjB1xOcrXOVw0mzCoajkF8wuG_1VXAzlZgDR5CHAzR2.jpg)