The TerraMaster D4-320U is a high-performance DAS enclosure equipped with 4 bays for SATA HDDs and SSDs, designed to expand storage capacity for servers, workstations, and NAS devices. Thanks to its USB 3.2 Gen 2 Type-C interface with a bandwidth of up to 10 Gb/s, the device provides fast data access and transfer speeds of up to 1016 MB/s. The enclosure supports up to 96 TB of storage capacity, is compatible with Windows, macOS, Linux, Proxmox, TrueNAS, and Unraid, and its compact design—just 241 mm deep—allows for convenient installation even in small server racks.
The D4-320U makes it easy to increase available storage space without having to replace existing servers or arrays. The four bays support 3.5-inch SATA HDDs, 2.5-inch HDDs, and 2.5-inch SSDs, allowing users to choose storage media that best suit their needs. With a maximum capacity of 96 TB, the device is ideal for data archiving, storing backups, and working with large file sets. This solution is designed for businesses and users who need scalable storage in a compact form factor.
The enclosure uses a USB 3.2 Gen 2 Type-C interface, which provides a bandwidth of up to 10 Gb/s. In tests with four drives, actual read and write speeds reached up to 1016 MB/s, allowing you to efficiently copy large amounts of data and handle demanding tasks. When using a single SSD, transfer speeds can reach 560 MB/s, ensuring fast handling of documents, multimedia, and backups. High performance translates to shorter completion times for everyday operations and greater convenience.
The enclosure is compatible with Windows, macOS, and Linux, as well as popular server and virtualization platforms such as Proxmox, TrueNAS, and Unraid. The Plug & Play feature eliminates the need to install drivers, so the device is ready to use immediately after connection. The package includes USB-C to USB-C and USB-A to USB-C cables, which facilitate integration with various computers and servers. Additionally, compatibility with USB 3.0, USB 3.1, USB 3.2, Thunderbolt 3, and Thunderbolt 4 ports ensures great flexibility when expanding your infrastructure.
The D4-320U has been optimized to work with TerraMaster NAS servers running TOS 5.1 or later. Once the device is connected via USB, you can create additional storage pools and expand the available data storage space. This solution allows you to scale your data storage environment as your business grows without having to invest in additional servers. It’s a convenient way to increase the capacity of your existing NAS system.
Three fans equipped with an intelligent temperature control system ensure effective cooling. Automatic speed adjustment helps maintain optimal operating conditions for the drives even under heavy load. With a noise level of approximately 26.7 dB(A), the device is suitable for use in an office environment. The drive sleep function further helps reduce energy consumption during periods of inactivity.
| Manufacturer | TerraMaster |
|---|---|
| Model | D4-320U |
| Number of bays | 4 |
| Supported drives | 3.5" SATA HDD, 2.5" SATA HDD, 2.5" SATA SSD |
| Maximum capacity | 96 TB (4 × 24 TB) |
| Host interface | USB 3.2 Gen 2 Type-C |
| Interface bandwidth | up to 10 Gb/s |
| Maximum transfer speed | up to 1016 MB/s |
| Single SSD read speed | up to 560 MB/s |
| Supported file systems | NTFS, APFS, Mac OS, FAT32, exFAT, EXT4 |
| Noise level | 26.7 dB(A) |
| Power supply | 72 W |
| Dimensions | 440 × 241 × 45 mm |
| Net weight | 2.7 kg |
| Supported operating systems | Windows, macOS, Linux |
Gifts with orders are constantly changing due to their limited quantity
FREE DELIVERY ON PURCHASES OF EUR 50 AND MORE
Free delivery to the Omniva postal machine when purchasing more than 50 EUR
Free delivery to LP Express or Lithuanian Post when purchasing more than 70 EUR
Free delivery to home or workplace when purchasing more than 150 EUR.
DELIVERY TO Express or Omniva PARCEL TERMINAL
Shipping costs EUR 2.49. To LP Express 3.99
If ordered before 14:00, we ship the goods on the same day (only on working days). Your order will be delivered to the parcel terminal within 1-3 working days from the day of dispatch. The nearest post office from the address you provided is automatically selected.
It is not possible to direct the shipment to another delivery location. You can collect the package at a time convenient for you. Parcel terminals are open 24 hours a day.
DELIVERY TO LITHUANIA POST OFFICES
The price of delivery to post offices is EUR 3.99.
If ordered before 14:00, we ship the goods on the same day (only on working days). The goods will be delivered to Lithuanian post offices within 1-3 working days from the day of dispatch.
HOME OR WORKPLACE DELIVERY BY COURIER
Delivery price - 4.99 EUR
The order will be picked up by a courier and delivered directly to your home or workplace. It usually takes 1-3 working days from the day of dispatch.
DELIVERY TO FOREIGN COUNTRIES
Delivery price - 6.99 EUR.
The order is dispatched within 2 working days. The delivery time varies depending on the country to which the package is going. In many cases, the delivery time is only 2-3 days longer than in Lithuania.
PS The price of delivery may increase if the goods are very large or their weight exceeds the standards indicated on the pages of the delivery services. In such cases, we contact and discuss the situation ourselves, you do not need to do anything additional.
