TERRAMASTER D4-320 4-Bay USB 3.2 Gen2 Enclosure - Fast DAS Performance

In this review the TERRAMASTER D4-320 stands out as a straightforward, high-capacity direct attached storage (DAS) enclosure for users who need fast transfers and easy drive handling. The single biggest reason to buy is its USB 3.2 Gen2 Type-C link that delivers very high throughput for multi-drive setups, making it well suited to video editors and backup rigs that want raw speed without RAID complexity. Setup is plug-and-play across Mac, Windows and Linux and the tool-free trays make drive swaps painless.

Key Features

• 10Gbps USB 3.2 Gen2: Provides high-speed data transfer suitable for sustained large-file moves and multi-stream media playback.
• Up to 120TB capacity: Supports a single HDD up to 30TB and four drives in total, letting users scale local storage for large archives.
• Hot swappable trays: Drives can be removed or added without powering down, which speeds maintenance and media swaps.
• Tool-free push-lock trays: The tray design secures disks on insertion and simplifies installing 3.5 in and 2.5 in SATA drives or SSDs.
• Quiet, temperature-controlled cooling: An intelligent fan and sound-absorbing panels lower noise and keep drives cool under load.
• Broad compatibility: Works natively on Mac, Windows and Linux and supports USB 3.0/3.1/3.2 and Thunderbolt host interfaces via Type-C.

Who It's For

The D4-320 is aimed at creative professionals, small studios and advanced home users who need a fast external multi-disk enclosure for bulk storage, video editing scratch space or Unraid-style arrays where a DAS front end is required. Its high combined throughput with four HDDs and solid single-SSD read speeds make it attractive where sustained transfer rates matter.

It is not for users who need built-in RAID or network-attached storage features; the device supports four independent disks with no RAID functions. If you require hardware RAID, network sharing with a built-in OS, or an integrated backup appliance, look to a NAS or RAID enclosure instead.

Pros & Cons

Pros

• Very fast USB 3.2 Gen2 performance for both single SSD and multi-HDD configurations.
• Tool-free, hot-swappable trays with a push-lock design make drive swaps quick and secure.
• Low noise and effective heat management improve reliability and a quieter workspace.
• Good cross-platform plug-and-play compatibility without driver installs.

Cons

• No RAID functionality - disks are presented as separate drives, which may require external software for pooled arrays.
• Some users report occasional click noises; noise is generally low but may vary with installed drives.

Specifications

Interface	USB 3.2 Gen2 Type-C (10Gbps)
Drive Bays	4 hot-swappable SATA bays
Maximum Single Drive	Supports up to 30TB per drive
Total Capacity	Up to 120TB
Drive Types Supported	3.5 in SATA HDD, 2.5 in SATA HDD, 2.5 in SATA SSD
Noise Control	Intelligent fan, sound-absorbing panels, vibration damping

Our Verdict

The TERRAMASTER D4-320 is a practical, high-speed DAS enclosure that delivers excellent value for users who need large local storage and fast transfers without RAID complexity. Its easy tool-free trays, hot-swap support and quiet cooling make it a sensible choice for content creators and backup workflows that prioritize throughput and convenience.

Frequently Asked Questions

Does this device support RAID?
The D4-320 does not include RAID; it exposes four independent disks and is intended as a DAS, not a RAID or NAS appliance.

Will it work with my Mac or Windows PC?
Yes, the enclosure is plug-and-play on Mac, Windows and Linux and uses USB Type-C compatible with USB 3.0/3.1/3.2 and Thunderbolt hosts.

Can I hot-swap drives while in use?
Yes, the unit supports hot swapping so drives can be removed or added without powering down, simplifying maintenance and media replacement.