# 4-bay external storage enclosure TERRAMASTER D4-320U USB3.2 10Gbps, supports 3.5"/2.5" HDD/SSD, UASP

**URL:** https://aio.lv/en/product--terramaster-d4-320u--11625906
**Data updated:** 2026-02-15 18:48 (EET)
**Category:** NAS Devices & Storage
**Manufacturer:** TERRAMASTER
**Manufacturer code:** D4-320U
**EAN:** 6939236146838
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 340.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 281.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--terramaster-d4-320u--11625906

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

TERRAMASTER D4-320U is a 4-bay external storage enclosure with USB 3.2 Gen 2 (10Gbps) connectivity for fast data transfer. It accommodates 3.5" and 2.5" HDDs or SSDs, supports UASP for improved performance, and offers hot-swap bays for easy drive replacement. Ideal for backup, media libraries, and expanding PC or NAS storage, providing straightforward plug-and-play operation.

## Long description

TERRAMASTER D4-320U is a 4-bay external storage enclosure that connects via USB 3.2 Gen 2 (10Gbps) to deliver fast data transfer between host systems and multiple drives. The unit accepts both 3.5" and 2.5" HDDs or SSDs and implements UASP support to reduce protocol overhead and increase throughput for compatible drives. Hot-swap drive bays and a tool-less tray design allow quick drive insertion and removal without powering down the enclosure, while a compact metal chassis provides stable operation and heat dissipation for sustained workloads.
Advantages
The enclosure offers high-speed USB 3.2 Gen 2 connectivity for up to 10Gbps transfer rates, combined with UASP support to improve sequential and random I/O performance for SSDs and modern HDDs. Four drive bays enable multi-disk configurations for increased capacity or use with RAID-enabled hosts. Hot-swap functionality and tool-less trays make drive maintenance and replacement straightforward. The metal housing and internal cooling design help maintain drive temperatures under load, and plug-and-play operation ensures compatibility with a wide range of operating systems without complex setup.
Suitable for
Expanding storage capacity for desktop PCs and workstations
External backup targets for local and scheduled backups
Media libraries and video editing projects demanding high sustained throughput
Temporary or portable multi-drive storage for data migration
Integrating additional drives with NAS or server systems supporting USB storage
Key specifications
Drive bays: 4 bays supporting 3.5" and 2.5" HDD/SSD
Interface: USB 3.2 Gen 2 (10Gbps)
Protocol support: UASP for improved performance
Drive hot-swap: Yes, tool-less trays for quick replacement
Chassis material: Metal housing with ventilation for heat dissipation
Supported drive types: SATA III HDD and SATA III SSD (2.5"/3.5")
How to use
Install the desired SATA drives into the trays by sliding each drive into the bay until it seats with the SATA connector. Insert the trays into the enclosure and lock them in place according to the enclosure's latch mechanism. Connect the enclosure to a host computer using a USB 3.2 Gen 2 cable and apply power. The host operating system should detect the enclosure and the installed drives; format and partition the drives or configure them in the host environment as required. For hot-swap operations, follow the host OS guidelines for safely ejecting or unmounting volumes before removing a drive from the enclosure.
Usage recommendations
Use high-quality SATA drives with known reliability for a multi-drive enclosure and consider using SSDs or enterprise-class HDDs for workloads requiring high I/O. Ensure the host system supports USB 3.2 Gen 2 and UASP to achieve maximum performance. Place the enclosure in a well-ventilated area to assist the built-in cooling, and perform regular backups when using the device for critical data. For RAID or advanced configurations, use host-side RAID controllers or software RAID solutions supported by your operating system.

## FAQ

### How much does the TERRAMASTER D4-320U 4-bay USB3.2 10Gbps enclosure cost, and is it available for purchase?

The price is 340.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can TERRAMASTER D4-320U 4-bay USB3.2 10Gbps enclosure be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All TERRAMASTER products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized TERRAMASTER service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty