UGREEN 65733EU CM847 USB4 Dual M.2 NVMe SSD Enclosure, 40 Gbps, Offline Clone, RAID

Overview

The UGREEN CM847 (65733EU) is a desktop enclosure that holds two M.2 NVMe solid state drives (SSDs) in one fan-cooled aluminium unit and connects over USB4 at up to 40 Gbps. It can also copy one drive to the other at the press of a button, with no computer attached, and supports RAID modes. It suits video editors, IT staff and anyone who needs fast two-drive storage or a quick way to clone an SSD.

Is it right for you?

• Suits a computer with a USB4 or similar port and cable if you want the 40 Gbps link; on other ports it still works at that port’s lower rate.
• Choose it if you need two drives, offline cloning or RAID. For a single portable drive, a one-bay enclosure is simpler.
• Takes M.2 NVMe drives only. An M.2 SATA drive is not supported even though it fits the slot.

Key features

• Two M.2 NVMe bays in one unit.
• USB4 host interface rated up to 40 Gbps with a USB4-class host and cable.
• One-touch offline clone from the bay marked Source A to the bay marked Target B.
• RAID capability, configured as described in the manual.
• Active fan plus an aluminium body to keep two drives cool.

What else you need

Two M.2 NVMe SSDs (or one, for single-drive use) and a computer with a USB data port. A USB4-class host and cable are needed for the full interface speed.

Installation

Fit the drives following the manual, which lists the supported key, length, capacity and any thermal pad needed. Back up both drives before cloning, changing modes or initialising.

Before you buy

• SSDs are not included.
• Use M.2 NVMe drives only; do not assume a physically similar SATA M.2 drive will work.
• The 40 Gbps figure is the interface rating, not a guaranteed file transfer speed.
• Offline clone copies Source to Target and can overwrite the whole target drive; nothing on the target is preserved.
• Check the screws, thermal pads, power parts and manual in the sealed package before fitting drives.