UGREEN D703 40Gbps M.2 NVMe SSD Enclosure with Fan

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Product guide

UGREEN D703 40Gbps M.2 NVMe SSD Enclosure with Fan

UGREEN D703 is a 40Gbps M.2 NVMe SSD enclosure with an aluminium body and built-in fan. Its listed 8 TB capacity and 2280-drive support suit a single compatible NVMe SSD, but the advertised data rate depends on the SSD and host connection.

At a glance

The listing states up to 40Gbps transfer and reports lab read/write results of 3,169 MB/s and 2,816 MB/s. Actual throughput can depend on the SSD and connected host.
The four-part cooling arrangement combines the aluminium body, fan, vents and thermal pad. Its stated surface-temperature figure is a manufacturer claim, not an independent measurement.
Supports M Key and M+B Key NVMe drives in 2280 size, up to the listed 8 TB capacity.
The listing says it works with Windows, Mac OS and Linux without requiring drivers.

Price

£61.49Save 23%

Reference price: ~~£79.99~~

Price checked: 14 Nov 2026

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Often bought together

Samsung 990 PRO NVMe M.2 SSD, 2 TB, PCIe 4.0, 7,450 MB/s read, 6,900 MB/s write, Internal SSD, For gaming and video editing, MZ-V9P2T0BW

£321.99

Pros and cons

Pros

Fan and thermal pad are specified alongside an aluminium enclosure for heat management during sustained transfers.
Dual-chip design is claimed to reduce power consumption by up to 33% compared with standard single-chip designs.
Support for Thunderbolt and USB standards is claimed, with listed compatibility spanning Windows, Mac OS and Linux.

Cons

The enclosure supports 2280 NVMe drives only, so other M.2 lengths and SATA NGFF drives are unsuitable.
The listing says PCIe Gen 5 SSDs are not compatible.

Technical specifications

18 specifications

Identity
Brand	UGREEN
Model	D703

Connection and speed
Hardware interface	Thunderbolt 3, Thunderbolt 4
Connectivity technology	USB, Thunderbolt
Advertised data transfer rate	40 Gigabits Per Second

Drive and compatibility
Maximum listed storage capacity	8 TB
Supported SSD types	M Key and M+B Key NVMe solid-state drives
Supported SSD size	2280
Compatible devices listed	MacBook M1 M2 M3 M4 Pro/Max

Materials and protection
Material listed	Aluminium
Colour	silver

Cooling and chips
Chipset listed	JHL7440 chip & RTL9210B chip
Cooling components	all aluminum body, turbo fan, dual vents, and a built-in thermal pad
Claimed surface temperature	48.3°C (at 25°C ambient temperature)

Operating system support
Operating systems	Windows, Mac OS, and Linux systems

Other details
Manufacturer	Ugreen Group Limited
Country of origin	China
Warranty listed	2 year manufacturer

What to know before buying

Listing details to confirm

Fit an M Key or M+B Key 2280 NVMe SSD, not a SATA NGFF drive. The listing excludes PCIe Gen 5 SSDs. The listed 40Gbps is a connection rate, while the separate lab read/write figures are manufacturer claims and not assured results for every SSD or host. Confirm your computer's port and drive compatibility before purchase.

What’s in the box

Included

UGREEN 40Gbps M.2 NVMe SSD enclosure

Who is it for?

A good fit for

Owners of a compatible 2280 NVMe SSD seeking a fan-cooled external enclosure for large file transfers.
Mac, Windows or Linux users whose host supports a compatible Thunderbolt or USB connection.

Less suited to

Anyone needing a SATA M.2 enclosure, support for non-2280 SSD sizes or compatibility with PCIe Gen 5 SSDs.
Buyers who need guaranteed transfer speeds or a consistently quiet fan. Customer feedback reports mixed experiences on both speed and fan noise.

UGREEN D703 40Gbps M.2 NVMe SSD Enclosure with Fan · photo 2 — Additional product photo 2

Customer reviews on Amazon

4 / 5 · 205 ratings

5 stars51%51%
4 stars17%17%
3 stars19%19%
2 stars5%5%
1 star8%8%

Customer feedback describes the enclosure as well-built and compact, with positive reports about performance and cooling. Experiences with speed are mixed, including reports that it does not reach advertised speeds. Fan noise and durability opinions also vary. These differences matter if sustained throughput, quiet operation or long-term reliability is a priority. The aggregate ratings are mixed rather than uniformly positive.

Positive themes

Customers describe the build quality and compact size positively.
Customers report positive experiences with performance and cooling.

Mixed feedback

Speed reports vary, with some customers saying it does not reach advertised speeds.
Customers disagree about how loud the fan is.
Durability feedback is mixed.

Frequently asked questions

Which SSDs fit the UGREEN D703?

The listing specifies M Key and M+B Key NVMe SSDs in 2280 size, up to 8 TB. It says SATA NGFF drives and PCIe Gen 5 SSDs are not supported.

Does the D703 guarantee 40Gbps file transfers?

No. The listing gives 40Gbps as the transfer rate and separately reports lab read/write figures. Actual speed depends on the installed SSD and host connection.

Does it work with Mac, Windows and Linux?

The listing claims compatibility with Windows, Mac OS and Linux without driver installation. Check that your host has a compatible connection.

Is an SSD included?

The explicit box contents list names the enclosure only. It does not list an SSD.