TERRAMASTER D4-320U – 4-bay 1U rackmount hard drive enclosure, USB 3.2 Gen2 10 Gbps (diskless)
The D4-320U puts four drive bays in a 1U chassis only 241 mm deep. It fits standard server racks without rails and can expand the storage of a TERRAMASTER NAS.
What the D4-320U does for your data
The 1U chassis is only 241 mm deep and weighs 3.2 kg, fitting standard server racks without rails.
USB 3.2 Gen2 reaches up to 1,016 MB/s with four hard drives and 510 MB/s with a single drive.
Four bays accept drives of up to 30 TB each for up to 120 TB of storage.
Connected to a TERRAMASTER NAS running TOS 5.1 or later, it expands storage pools and arrays managed by TOS.
Plug-and-play with no drivers, compatible with Windows, macOS and Linux.
Compatible with USB4, USB 3.2, 3.1 and 3.0 as well as Thunderbolt 5, 4 and 3 ports, with both cable types included.
Ready to organise your storage?
Check today’s price and delivery time for the TERRAMASTER D4-320U.
Backup, sharing, work
Who is it for?
A good choice if…
Small businesses and home offices with a server rack who want compact, centralised storage.
Check before you buy
Supplied diskless; the D4-320U has no RAID of its own and works with individual disks. NAS expansion requires a TERRAMASTER NAS running TOS 5.1 or later.
Technical specifications
| Drive bays | 4 |
|---|---|
| Format | 1U rackmount, 241 mm deep |
| Weight | 3.2 kg |
| Interface | USB 3.2 Gen2 Type-C, 10 Gbps |
| Speed (4 HDD) | Up to 1,016 MB/s |
| Maximum capacity | 120 TB (4 x 30 TB) |
| RAID | Not supported, individual disks |
| In the box | USB-C to C and USB-A to C cables, power adapter |
| Drives included | No (diskless) |
Frequently asked questions
Do I need rails to install it?
No. The short 1U chassis fits standard server racks without rails.
Can it expand my TERRAMASTER NAS?
Yes, with a TERRAMASTER NAS running TOS 5.1 or later; arrays are then created through TOS.
Does it have hardware RAID?
No. The D4-320U works with individual disks only.
The TERRAMASTER D4-320U price changes often
Deals, stock and delivery times change daily: check today’s offer in one click before it moves.
