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TERRAMASTER D6-320 External Hard Drive Enclosure 6-Bay | USB 3.2 Gen2 10Gbps Type-C HDD Storage Hot Swappable Plug and Play (Diskless)

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Arrives Wednesday, Sep 16
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Model: D6-320


Features

  • High Speed Data Transmission: The D6-320 hard drive enclosure (a DAS, NOT a NAS) adopts USB 3.2 Gen2 protocol for high-speed data transmission up to 10Gbps. With 6 hard drives installed, the read/write speed can reach up to 1,030MB/s (SATA III HDD 8TB x 6). With one SSD installed, the read speed can reach 510MB/s (SATA III 1TB SSD x 1)
  • Super-Large Storage Capacity: The D6-320 HDD storage enclosure can support up to six 3.5" and 2.5" SATA HDD, as well as 2.5" SATA SSD, with a maximum capacity of 22TB per drive, providing users with up to 132TB (22TB x 6) of storage space. Note that the D6-320 does not support arrays and only works with individual disks
  • Plug and Play Compatibility: The D6-320 das storage is a plug-and-play device that doesn't require drivers to work. It is highly compatible with MAC, Windows, and Linux operating systems. It has a USB Type-C interface and comes with a USB type C-type C cable. The device is compatible with various computer interfaces, including USB 3.0, USB 3.1, USB 3.2, Thunderbolt 3, and Thunderbolt 4
  • Hot Swappable Functionality: The D6-320 USB enclosure supports hot swapping, which allows you to replace the hard disk without having to power off the device. This feature makes data transfer more convenient and efficient
  • Intelligent Heat Dissipation System: The D6-320 USB storage has an intelligent temperature-controlled and low-noise fan that automatically adjusts its speed based on the temperature of the hard disk. This feature ensures that the hard disk operates at its best temperature and provides better heat dissipation

Description

TerraMaster’s focus has been on digital storage products. In line with the evolving technological landscape, TerraMaster has developed a distinctive product line, which includes both direct and network attached storage devices. At present, TerraMaster sells its products in more than 40 countries, which are widely used in education, finance, government, supermarkets, clinics, scientific research, law firms, film production, home, and other fields. High-speed data transfer and massive storage capacity: The D6-320 hard drive enclosure features a USB3.2 Gen2 interface providing a 10Gbps data transmission bandwidth. With the capability to support up to six 3.5" and 2.5" SATA HDD, and 2.5" SATA SSD, it offers a maximum drive capacity of 22TB and a storage space of up to 132TB (22TB x 6). When six hard drives are installed (SATA III HDD 8TB x 6 simultaneously read/write), it delivers an actual read/write speed of up to 1,030MB/s, while a single SSD installation (SATA III 1TB SSD x 1) can reach a read speed of 510MB/s. Please note that the D6-320 does not support the function of array and only supports individual disks. Highly Compatible Interface: The D6-320 USB storage comes with a 1-meter USB Type-C to Type-C cable and is plug-and-play, requiring no drivers. It is compatible with a range of computer interfaces, including USB 3.0/3.1/3.2, Thunderbolt 3/4. Hot Swappable, Intelligent Disk Sleep: The D6-320 HDD storage allows hot swapping for convenient hard disk replacement while powered on. It supports the sleep function to reduce power consumption and extend the hard disk's service life by following the computer OS's sleep mode. Better Heat Dissipation: The D6-320 HDD enclosure features a temperature-controlled fan that adjusts its speed according to the hard disk's temperature for optimal performance. Its internal structure is optimized to increase air pressure, reduce hard disk temperature, and minimize noise and resonance. These features enable the D6-320 to operate quietly even under heavy load. Expansion of NAS Storage Space: The D6-320 DAS storage is compatible with TerraMaster NAS via USB interface with proper adaptation. Users can expand the NAS storage space by creating arrays and storage pools on D6-320 through TerraMaster TOS. Note: this feature requires TerraMaster NAS with TOS 5.1 or later version. Note: Some mini PCs may have weaker USB signal output, which can cause random interruptions during file read/write operations during data transmission. When this occurs, it is recommended to 1) use the rear USB ports of the computer, as they typically provide a more stable signal; 2) test the device on another known-good computer to rule out hardware issues on the original PC; and 3) use a 10Gbps USB-A/USB-C hub or splitter with a short 0.3m–0.5m cable to reduce signal loss. TERRAMASTER D6-320 TERRAMASTER D4-320 TERRAMASTER D5 Hybrid TERRAMASTER D8 Hybrid

Hardware Interface: USB 3.2 Gen 2


Brand: TERRAMASTER


Product Dimensions: 8.58"L x 5.12"W x 8.9"H


Hardware Platform: Windows, Mac, Linux


Material: Metal


Hardware Interface: USB 3.2 Gen 2


Hardware Platform: Windows, Mac, Linux


Compatible Devices: Windows, Mac, Linux


Hard Disk Form Factor: 3.5 inches


Supported Devices Quantity: 6


Data Transfer Rate: 10 gigabits_per_second


Connectivity Technology: SATA, Thunderbolt, USB


Enclosure Material: Metal


Item Dimensions L x W x H: 8.58"L x 5.12"W x 8.9"H


Item Weight: 4.1 kg


Brand: TERRAMASTER


Number of Items: 1


Manufacturer: TERRAMASTER


Built-In Media: Hard Drive Enclosure


Model Number: D6-320


Mfr Part Number: D6-320


Warranty Description: 2 Years


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Plug-n-play. Easy to use. Packaging however not spot on.
Model: D6-320
From the moment the TERRAMASTER D6-320 External Hard Drive Enclosure arrived, it promised simplicity and efficiency. Designed to partner seamlessly with large-format hard drives, it sparked excitement for what was to come. However, tech's unpredictable nature soon unveiled itself – a USB connection issue surfaced, casting a shadow of doubt. Was it the enclosure or something else? The plot thickened when the hard drive, purchased separately, was discovered dead on arrival (DOA). Here, Terramaster shone brightly, their customer support stepping in like the heroes of our story. They facilitated a swift return and replacement through Amazon, showcasing their commitment to customer satisfaction. Yet, the twist in our tale – the same USB mystery reappeared. Despite this, the enclosure soldiered on, functioning as intended, a testament to its resilience and quality. The only hiccup? A missing protective sleeve in the second shipment, a minor blip that required a dash of creativity to solve. In the end, the TERRAMASTER D6-320 External Hard Drive Enclosure stands as a beacon of reliability, backed by stellar customer support. While the journey had its ups and downs, the product delivered on its promise, albeit with a gentle reminder: in the world of tech, sometimes, you have to expect the unexpected (and maybe improvise a little). Pros: Reliable performance Exceptional customer support Cons: Potential USB connection mystery Packaging inconsistencies Final Verdict: A great product with a few quirks, the TERRAMASTER D6-320 is for those who value reliability and are ready to tackle minor challenges head-on. It’s not just about the destination but the journey – and this journey, with its mix of trials, tech, and terrific support, is well worth it. ... show more
Reviewed in the United States on March 25, 2024 by Alexander D. Dragu

  • Solid and reliable with excellent speed. Worth the price.
Model: D6-320
This is the third 6+ drive enclosure I'd tried. The first two kept suddenly failing and disconnecting from the PC while writing which required a partition repair repeatedly. They were 2/3 the price, but were garbage. Terramaster is solid and much more compact than the previous units. I did have to buy a USB C to USB A Cable 3.1/3.2 Gen 2, which works great with excellent speed. Ordered a second TERRAMASTER D6-320. Don't go cheap on these enclosures and you'll save money. ... show more
Reviewed in the United States on April 10, 2026 by Amazon Customer

  • Nice DAS. Performs well. Attractively priced.
Model: D6-320
Bought in July 2024. Still working very well. Great price for a 6 bay DAS. I'm using with Win 11 Storage spaces. Two of the drives are set up in a RAID 1 config. The others are in a single drive config. Performance is very reasonable over USB 4. However don't expect super speed. If you REALLY need high performance use an internal SSD directly connected to the motherboard. I just need plain vanilla storage in a large volume with RAID configuration options and this serves me very well. To date, the drive configs have been stable with no issues. See enclosed benchmarks. I'm driving the Terramaster D6-320 with a Geekom A7 mini PC. I've moved from a tower case with a 750W power supply to the Geekom A7 and the Terramaster D6320 and I'm VERY happy. This config runs at a fraction of the power draw of my tower and is MUCH quieter. ... show more
Reviewed in the United States on December 20, 2025 by cyburbanyte

  • D6-320 off to a good start
Model: D6-320
I bought this to use with a mini pc as sort of a poor man’s NAS. Being used with Windows 11, drivepool and snapraid. I have four HDD and two SSD in two different pools (each serves its own purpose). Windows saw all drives and drive pool created my two pools without issue. So far it runs quiet and cool. Nitpicks: screws for the drive sleds are tiny but on the upside the included screw driver is magnetic. The lights on the front are bright and not easily covered by tape. The power button is like looking into the sun at night, but that one thankfully is easily covered. It would be nice to have the option to disable status LEDs. Over a solid deal in a good footprint from Terramaster. ... show more
Reviewed in the United States on February 12, 2024 by JJ

  • Underwhelming build quality
Model: D6-320
Reviews for Terramaster products over various tech and computer communities were fairly positive. After receiving this item, I am disappointed in the build quality of the Terramaster D6-320. It is optimized for cheapness, while using good chipsets. The drive trays are made of thin metal, and you have to add a thin insert that is included to protect the hard drive PCB from touching the metal drive tray. But the thin insert barely covers all the areas where the PCB may touch, leaving zero room for error. The mechanism to remove, insert and secure the drives are good. Although the instructions seem unclear whether I need to use screws to secure the drives, and if I should use bottom screws or side screws. After installing five drives, upon powering up, I am faced with vibrating and rattling side panels because they are so thin. They stop after a while and some pressing. winsat test shows about 150-160 MB/s for read and write to one drive. Drive cooling compared to a Syba is inferior. The same drives run about 1-3 degrees Celsius higher. It seems to use ASM235CM USB-to-SATA bridge, does not use a port multiplier, possibly uses separate bridge device for each drive, so good components overall. Ultimately, I think I should have stuck with the newer revision Syba. ... show more
Reviewed in the United States on March 8, 2026 by XILEX

  • MacOS - this is the one (Windows and Linux also)
Model: D6-320
Not all enclosures play nice with Mac, this one does. Finding Thunderbolt, is rare, but also that has 6 bays & can handle 20TB drives is harder than you would think. This one handles all of that, and does it well. My only issue is that 10gbps is slower transfer than I hoped for, really wanted 80gbps, but TB5 enclosures are very rare. Even TB4 is very rare at this time. I appreciate the build quality, very solid, the box has some heft to it. The drive trays are all metal, slide in HDD, add 4 screws in the bottom to ensure rock solid stablity. The drives use the lever/latch method, which I prefer, really adds a solid feel and connection, which gives you easy access, and a solid lock down. Power supply meets the needs. The cooling fans keeps things cool, but run quiet. This box is compatible with macOS, Windows and Linux - options abound. ... show more
Reviewed in the United States on March 9, 2026 by Bronz_Mdl

  • Works extremely well on Linux
Model: D6-320
Works extremely well. I was able to add six old hard drives that I had laying around, and access them on my PC running Linux Mint (I did have to add two udev rules to authorize it so it would mount, but that's not too hard). Quality is good, and the drives sit snugly in the enclosure.
Reviewed in the United States on September 21, 2025 by Eric

  • Good customer service after encountering hardware issue
Model: D6-320
Edited 11/2025: * Terramaster provided two USB cable (A to C) and (C to C). After replacing the cable it has resolve the instability issue. Thus far the system has been stable for the last week. Currently rebuilding the RAID10 array. Edited 10/2025 1/5 Stars: Critical Hardware Failure - Unstable Under Load, Not Safe for RAID Model Purchased: Terramaster D6-320 (Direct Attached Storage) I purchased the D6-320 to host a large 6-disk RAID 10 array. While the initial setup was fine, the enclosure has proven to be critically unstable and unreliable under load, making it unsuitable for any data storage that requires integrity and redundancy. The Core Problem: The enclosure repeatedly suffers from intermittent disk dropouts, which is evidenced by repeated failures in my mdadm RAID 10 array (/dev/md127). The array first went degraded when three disks failed spontaneously. After successfully re-assembling the array, the subsequent resync process (which puts high load on the hardware) failed again at 84% completion, taking out three different disks, two of which were previously stable. Crucial Troubleshooting Steps: To rule out drive or power issues, I performed extensive testing: * Reseated existing disks * I installed a new set of disks. * I swapped the unit's power adapter for an alternative power supply. The failure pattern remains consistently repeatable whenever the array is under heavy I/O load. This conclusively proves the issue is not with the drives or the PSU, but with the D6-320 enclosure's internal components, specifically the drive backplane or the host controller. Conclusion: This is a fatal hardware flaw. A storage enclosure that cannot handle a simple array resync is not fit for purpose and poses a serious risk to data integrity. I am now forced to initiate an urgent warranty claim for a replacement. If you plan to use this enclosure for a critical RAID array, be warned: this model appears to contain a hardware defect that makes it fundamentally unreliable when stressed. Look elsewhere for stable, redundant storage. ... show more
Reviewed in the United States on October 25, 2025 by Jason

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