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Black four-bay NVMe enclosure, compact book-sized form, USB4 40Gbps Type-C

TERRAMASTER

TERRAMASTER D4 4-bay USB4 40Gbps NVMe enclosure

SKU CH-RHQR-7X3CS

Holds four M.2 NVMe SSDs up to 32 TB total, connects via USB4 40 Gbps for up to 3,224 MB/s with four drives, and includes auto-backup apps for mobile and Windows

  • ColorBlack
  • 40Gbps bandwidth moves 4K footage fast with up to 3,224 MB/s on four drives
  • Four M.2 2280 slots give 32 TB capacity in a 138 x 60 x 140 mm case
  • Temp-controlled fans run at 19 dB(A) standby for silent desk use
  • Plug into Mac mini or Windows PC and boot macOS directly from the enclosure
  • TDAS mobile app plus TPC Backupper schedule automatic iOS, Android and Windows backups

Four-Bay NVMe Enclosure

The TerraMaster D4 holds four M.2 2280 NVMe SSDs in a compact, diskless chassis measuring 138 x 60 x 140 mm. It connects via USB4 at 40Gbps and is compatible with Thunderbolt 5, 4 and 3. The unit ships with a 12V/2A power adapter supporting 12V-20V input and includes active, temperature-controlled cooling.

Media Creators and Mac Mini Owners

This enclosure suits video editors, photographers and Mac mini users who need fast, portable external storage or a bootable macOS drive. It is not for builders who require hardware RAID, users who need 2.5-inch or 3.5-inch drive support, or anyone wanting a NAS with built-in network ports.

40Gbps USB4 Interface

The single specification that decides fit is the 40Gbps USB4 connection, which delivers up to 3,224MB/s with four SSDs or 1,608MB/s with a single drive. Your host must provide a USB4 or Thunderbolt 3, 4 or 5 port to reach these speeds; lesser ports will limit throughput.

Highlights

  • 40Gbps bandwidth moves 4K footage fast with up to 3,224 MB/s on four drives
  • Four M.2 2280 slots give 32 TB capacity in a 138 x 60 x 140 mm case
  • Temp-controlled fans run at 19 dB(A) standby for silent desk use
  • Plug into Mac mini or Windows PC and boot macOS directly from the enclosure
  • TDAS mobile app plus TPC Backupper schedule automatic iOS, Android and Windows backups

Specifications

ColorBlack

Questions about this item

Which capacity should I pick for the four M.2 slots?

Each slot accepts an M.2 2280 NVMe SSD up to 8 TB, so the enclosure can hold 32 TB total when all four bays are populated.

What does the 3224 MB/s figure mean once the unit is in my Mac or PC?

That is the measured sequential throughput with four Samsung 990 PRO 4 TB drives connected via USB4 40 Gbps to an Apple M4 Mac mini; a single drive in the same enclosure reaches 1608 MB/s.

What interface standard caps the real-world speed of this enclosure?

The USB4 40 Gbps link is the bottleneck; the enclosure also negotiates Thunderbolt 5/4/3 and USB 3.2/3.1, but the 40 Gbps ceiling limits combined SSD throughput to the quoted 3224 MB/s.

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