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Black aluminium USB4 NVMe M.2 enclosure, open design for passive cooling

Syba

Syba SY-TDB40178 USB4 40Gbps NVMe M.2 B+M-Key drive enclosure

SKU CH-GM49-GTVA9 MPN SY-TDB40178

USB4 40 Gbps aluminium enclosure for M.2 NVMe B+M-Key SSDs up to 22110 size, no power adapter required

  • Drive interfaceM.2 NVME B+M-Key
  • Product colorBlack
  • Main materialAluminum alloy
  • USB4 40Gbps bandwidth enables ultra-fast NVMe transfers
  • Aluminium alloy body provides passive cooling without a fan
  • Supports M.2 NVMe drives 2230 to 22110 with B+M or M-Key
  • Bus-powered via USB-C so no separate adapter required
  • Works with Thunderbolt 3/4/5 and Windows, macOS, Linux, Android, iOS

USB4 40Gbps NVMe enclosure

The Syba SY-TDB40178 is a USB4 40Gbps enclosure that accepts M.2 NVMe SSDs with B+M-Key connectors. It draws power from the host port and needs no external adapter. The aluminium case provides passive cooling for sustained workloads.

B+M-Key M.2 NVMe only

Only M.2 NVMe drives with B+M-Key or M-Key pinouts fit this enclosure; SATA-based M.2 modules are not supported. Compatible lengths include 2230, 2242, 2260, 2280 and 22110. The internal interface is PCIe NVMe exclusively.

Thunderbolt 3/4/5 host required

Full 40Gbps throughput requires a host port that implements Thunderbolt 3, 4 or 5 alongside USB4. The enclosure works with Windows, macOS, Linux, Unix, Android and iOS. It adds no active cooling, so system airflow must handle drive heat.

How it compares

Measured against everything we stock in External Drive Enclosures, at today’s prices. Recalculated every night.

Price $43.99
Pricier than about 60% of the 821 comparable items (median $30.99).

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Specifications

Product
Brand nameSYBA
Model nameSY-TDB40178
Product colorBlack
Storage
Drive interfaceM.2 NVME B+M-Key
Ports & slots
Thunderbolt 3 supportYes
Power
Power adapterNo
Size & build
Main materialAluminum alloy
Shipping weight0.20 kg
Package size150 × 95 × 38 mm

Questions about this item

What does the 40 Gbps figure mean for real-world file transfers?

The enclosure connects over USB4 or Thunderbolt 3/4/5 at up to 40 Gbps, so an NVMe drive inside can deliver its full sequential read and write speed instead of being limited by a slower port.

Which interface standard caps the speed and what does it allow?

USB4 Gen 4x4 and Thunderbolt 3/4/5 both cap at 40 Gbps, letting the M.2 NVMe B+M-Key SSD run at PCIe lane speed without a separate power adapter.

What physical M.2 sizes and keys fit inside the aluminium case?

The dock accepts M.2 NVMe drives with M-Key or B+M-Key connectors in 2230, 2242, 2260, 2280 and 22110 lengths; SATA or B-Key-only SSDs are not supported.

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