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I have previously reviewed the TerraMaster TD2 Thunderbolt DAS and the D5-300C USB3.0 5-Bay RAID DAS and was impressed with both of them. They are ideal for content creators that need access to large amounts of storage with faster speeds than you’d see on a NAS. They also cost a lot less money than the equivalent NAS.
TerraMaster has now announced the D6-320. This is a 6-bay DAS that supports 6x22TB drives for up to 132TB of storage.
It then has the latest USB3.2 Gen2 port, which is capable of 10Gbps data transmission bandwidth, with the actual read/write speed up to 1,016MB/s when 6 hard drives are installed (WD Red 8TB x 6 simultaneously read/write); with only one hard disk installed, the read speed could reach 510MB/s (WD Red 1TB SSD x 1).
The D6-320 is compatible with various hard disks, such as 3.5-inch and 2.5-inch SATA hard disks, and 2.5-inch SATA SSD. It also supports hot swapping.


Unlike the D5-300C I previously reviewed, the D6-320 lacks any sort of built-in RAID functionality and only supports JBOD single-disk working mode. However, you can set up a software RAID through Windows, using either Storage Spaces or Disk Management. There are also various other RAID solutions, such as SnapRAID.
One interesting use of this DAS is to expand the storage of a TerraMaster NAS. You can connect via USB and then create storage pools on the D6-320 with the NAS. This requires TOS 5.1 or above.
The TerraMaster D6-320 is available to buy now. It has an RRP of £299 but it has already been reduced on Amazon to £270.
Preview | Product | Rating | Price | |
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![]() | TERRAMASTER D6-320 External Hard Drive Enclosure - USB 3.2... |
£299.99 | Buy on Amazon |

I am James, a UK-based tech enthusiast and the Editor and Owner of Mighty Gadget, which I’ve proudly run since 2007. Passionate about all things technology, my expertise spans from computers and networking to mobile, wearables, and smart home devices.
As a fitness fanatic who loves running and cycling, I also have a keen interest in fitness-related technology, and I take every opportunity to cover this niche on my blog. My diverse interests allow me to bring a unique perspective to tech blogging, merging lifestyle, fitness, and the latest tech trends.
In my academic pursuits, I earned a BSc in Information Systems Design from UCLAN, before advancing my learning with a Master’s Degree in Computing. This advanced study also included Cisco CCNA accreditation, further demonstrating my commitment to understanding and staying ahead of the technology curve.
I’m proud to share that Vuelio has consistently ranked Mighty Gadget as one of the top technology blogs in the UK. With my dedication to technology and drive to share my insights, I aim to continue providing my readers with engaging and informative content.
Last update on 2025-02-16 / Affiliate links / Images from Amazon Product Advertising API