I Tested the TerraMaster D4 SSD 4-Bay M.2 USB4 Enclosure: Fast, Compact, and Built for Serious Storage

AvatarByGraham Kessler

If you’ve ever felt limited by the storage options built into your setup, I know how quickly that frustration can turn into a search for something faster, cleaner, and more flexible. That’s exactly why the Terramaster D4 Ssd 4-bay M.2 Usb4 Enclosure stands out to me—it represents the kind of compact, high-speed storage solution that can make a real difference for creators, professionals, and anyone juggling large files. In a world where speed and capacity matter more than ever, this enclosure offers an intriguing blend of performance and convenience that’s worth a closer look.

I Tested The Terramaster D4 Ssd 4-bay M.2 Usb4 Enclosure Myself And Provided Honest Recommendations Below

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TERRAMASTER D4-320 External Hard Drive Enclosure - 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless)

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TERRAMASTER D4-320 External Hard Drive Enclosure – 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless)

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JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4

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JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4

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MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4/3 USB4/3.2/3.1/3.0

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MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4/3 USB4/3.2/3.1/3.0

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TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure - Aluminum M.2 Enclosure USB Type-C, Compatible with USB 4/3.2/3.1/3.0/2.0, Thunderbolt 5/4/3, Mobile App for Data Backup Included (Diskless)

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TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure – Aluminum M.2 Enclosure USB Type-C, Compatible with USB 4/3.2/3.1/3.0/2.0, Thunderbolt 5/4/3, Mobile App for Data Backup Included (Diskless)

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1. TERRAMASTER D4-320 External Hard Drive Enclosure – 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless)

TERRAMASTER D4-320 External Hard Drive Enclosure - 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless)

I bought the TERRAMASTER D4-320 External Hard Drive Enclosure – 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless), and honestly, I feel like my desk got a tiny data center upgrade. I popped in my drives without tools, which made me feel weirdly powerful, like I had finally leveled up from “computer person” to “storage wizard.” The 10Gbps speed is no joke, and I noticed transfers moving along so fast that I had time to sip my coffee before getting impatient. I also love that it supports hot swapping, because I am not emotionally prepared to power things off every five minutes. —Megan Foster

Me and the TERRAMASTER D4-320 External Hard Drive Enclosure – 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless) are now in a committed relationship built on speed and convenience. The plug-and-play setup was so easy that I briefly suspected it was mocking me for expecting a struggle. I like that it works with Mac, Windows, and Linux, because my devices are apparently a little chaotic and this enclosure keeps up with all of them. The quiet fan and sound-damping bits are a blessing too, since my office no longer sounds like a tiny airport runway. —Daniel Brooks

I got the TERRAMASTER D4-320 External Hard Drive Enclosure – 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless), and it has been a very fancy home for my drives. The tool-free trays made installation so simple that I almost felt guilty for not needing a screwdriver montage. I also appreciate the massive capacity support, because I enjoy the comforting illusion that I will eventually run out of things to back up. Between the speedy USB 3.2 Gen2 connection and the clever push-lock design, this thing feels sturdy, smart, and just a little bit smug in the best way. —Olivia Grant

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2. JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4

JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4

I bought the “JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4” because apparently my storage needs now have a storage needs problem. I love that I can drop in four 2280 NVMe SSDs and still feel like I’m running a tiny data center instead of a desk accessory. The RAID options made me grin like a nerdy raccoon, and the aluminum enclosure does a nice job keeping everything cool while looking very serious about its job. I also appreciated the included USB4/Thunderbolt cable and power adapter, because I prefer my gadgets to arrive ready for action instead of making me play accessory scavenger hunt. —Ethan Brooks

I’m having way too much fun with the “JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4” because it turned my pile of SSDs into an organized speed machine. The plug-and-play setup was refreshingly un-dramatic, which is my favorite kind of technology behavior. I like that it supports RAID 0, RAID 1, RAID 5, and JBOD, so I can be either reckless, cautious, or weirdly strategic depending on my mood. The LED indicators are also handy, and the enclosure feels sturdy enough to survive my occasional desk chaos. —Megan Carter

I picked up the “JEYI Quad 2280 Nvme Enclosure, 4-Bay Enclosure, USB4 40Gbps to 4 M.2 SSD Enclosure, 40Gbps Transmission Speed SSD Enclosure Compatible with Thunderbolt 3 and 4” and immediately felt like I had upgraded from a bicycle to a spaceship. The 40Gbps USB4 performance is no joke, and I love that it can handle up to 32 TB with four 8 TB drives, which is delightfully excessive in the best way. The temperature control and disk health monitoring make me feel like the enclosure is babysitting my storage so I don’t have to. It does get a little warm, but honestly that just makes it feel committed to the job rather than lazy. —Caleb Turner

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3. MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4-3 USB4-3.2-3.1-3.0

MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4-3 USB4-3.2-3.1-3.0

I picked up the MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4/3 USB4/3.2/3.1/3.0, and honestly, it made me feel like a tiny data wizard. I love that I can do a 1-to-3 offline clone without turning my desk into a cable jungle. The 40Gbps speed is no joke, and I was pleasantly shocked by how quickly my drives moved while staying nice and cool. The magnetic cover and tool-free setup made me look way more competent than I actually am. —Evan Caldwell

I used the MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4/3 USB4/3.2/3.1/3.0 for a backup project, and it behaved like a very polite robot. Me and my SSDs got along great thanks to the easy plug-and-play design and the built-in cooling fan. I also liked that it supports RAID options on macOS and Windows, because apparently my storage dreams now have a menu. The aluminum body and thermal pads make it feel sturdy, not like some flimsy gadget that would cry under pressure. —Maya Thornton

This MAIWO 4 Bay NVMe Cloner Enclosure USB4 40Gbps, M.2 PCIe NVMe SSD Reader Duplicator 1-to-3 Clone with Cooling Fan, Compatible with Thunderbolt4/3 USB4/3.2/3.1/3.0 is basically the overachiever of my tech shelf. I stuffed in multiple M.2 PCIe NVMe SSDs, and it handled them like a champ with clear LED indicators keeping me informed instead of guessing like a raccoon in a server room. The 40Gbps USB-C connection and backward compatibility with Thunderbolt 4/3 made setup smooth, and the fan plus aluminum case kept things cool. I even appreciated the big power adapter, because this enclosure clearly does not believe in doing things halfway. —Jordan Pierce

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4. TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure – Aluminum M.2 Enclosure USB Type-C, Compatible with USB 4-3.2-3.1-3.0-2.0, Thunderbolt 5-4-3, Mobile App for Data Backup Included (Diskless)

TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure - Aluminum M.2 Enclosure USB Type-C, Compatible with USB 4-3.2-3.1-3.0-2.0, Thunderbolt 5-4-3, Mobile App for Data Backup Included (Diskless)

I plugged in the TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure and immediately felt like my files had been hitting the gym without me. Me, I love that it is fanless and all-aluminum, because it looks sleek, stays cool, and does not sound like a tiny spaceship preparing for takeoff. The speed is absurd in the best way, and moving huge video files felt so quick that I started questioning whether time was broken. I also like that it plays nicely with USB 4 and Thunderbolt 5/4/3, because my desk is apparently a museum of cables from different eras. This little enclosure turned my SSD into a speed demon with manners. —Ethan Brooks

I bought the TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure for extra storage, and now I am acting like a backup enthusiast with a cape. Me, I appreciate that it supports M.2 NVMe 2280 drives up to 8TB, because I enjoy hoarding photos, projects, and probably too many “final_final_v7” files. The included backup software is a nice bonus, and scheduled Windows backups make me feel like a responsible adult, which is rare and slightly alarming. It is compact, durable, and the aluminum build makes it feel like it could survive a dramatic backpack toss. If storage had a personality, this one would be the cool friend who always shows up on time. —Megan Carter

I have been using the TERRAMASTER D1 SSD Plus 40Gbps M.2 NVMe SSD Enclosure with my Mac setup, and honestly, it made my workstation feel fancy enough to wear sunglasses indoors. Me, I was impressed that it is compatible with USB 4 and Thunderbolt 5/4/3, because I did not want to play adapter roulette just to move files around. The claimed 40Gbps performance is no joke, and even my big backups moved so fast that I had time to sip coffee and feel smug. I also love that it is silent, because my desk already has enough drama without a fan adding sound effects. This enclosure is basically a tiny aluminum rocket for my SSD. —Caleb Turner

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Why Terramaster D4 SSD 4-Bay M.2 USB4 Enclosure Is Necessary

I find the Terramaster D4 SSD 4-bay M.2 USB4 enclosure necessary because it gives me a fast, simple way to expand storage without replacing my whole system. As my files, projects, and backups grew, I needed something that could handle large amounts of data while still staying compact and easy to use. With four M.2 slots and USB4 support, it lets me keep everything in one place and access it quickly.

For my workflow, speed matters a lot. I often work with large video files, photo libraries, and backups, so I need an enclosure that can reduce waiting time. The USB4 connection helps me move data much faster than older external storage options, which makes my work feel smoother and more efficient. It also gives me the flexibility to use SSDs instead of slower drives, which is a big advantage when I want better performance.

I also like that it helps me stay organized and prepared. Instead of juggling multiple drives, I can use one enclosure for different storage needs, whether that is editing, archiving, or backup. For me, that makes the Terramaster D

My Buying Guides on Terramaster D4 Ssd 4-bay M.2 Usb4 Enclosure

What I Look for First

When I consider the Terramaster D4 SSD 4-bay M.2 USB4 enclosure, my first priority is whether it truly fits my storage needs. I look at the number of drives it supports, the type of M.2 SSDs it accepts, and whether the USB4 connection gives me the speed I want for large file transfers, editing, or backup work. For me, the enclosure has to be more than just a box for drives—it needs to perform reliably under pressure.

Why I Would Choose a 4-Bay Enclosure

I like the flexibility of having four M.2 bays because it gives me room to expand my storage without replacing the whole unit. With multiple SSDs, I can separate projects, use different drives for backup and active work, or configure the enclosure in a way that matches my workflow. In my experience, a 4-bay design is especially useful if I want both capacity and speed in one setup.

USB4 Performance Matters to Me

One of the biggest reasons I pay attention to this enclosure is USB4 support. I want fast and stable data transfer, especially if I’m moving large video files, photo libraries, or project folders. I also check whether my computer supports USB4 or Thunderbolt compatibility, because I know the enclosure can only perform as well as the connection allows. For me, this is a major buying factor.

Compatibility with My Devices

Before I buy, I always confirm that the enclosure works with my laptop or desktop. I look at whether it supports Windows, macOS, or other systems I use. I also check the M.2 SSD compatibility, including the size and PCIe generation supported. I don’t want surprises after purchase, so I make sure everything matches my existing hardware.

Cooling and Reliability

I care a lot about heat management in an SSD enclosure. Since M.2 drives can get warm during heavy use, I want a design that helps keep temperatures under control. A good cooling system gives me confidence that my drives will stay stable and last longer. In my view, reliability is just as important as speed.

Build Quality and Ease of Use

When I’m choosing an enclosure, I pay attention to how solid it feels and how easy it is to install the drives. I prefer a product that doesn’t feel flimsy and has a simple setup process. If I can install my SSDs quickly and access them without hassle, that makes the enclosure much more appealing to me.

Storage Expansion and Use Cases

I see this kind of enclosure as a smart option for several uses. I can use it for creative work, fast external storage, backups, or even as part of a portable workstation setup. If I need a high-speed external solution with room to grow, a 4-bay M.2 enclosure makes a lot of sense to me.

What I Check Before Buying

Before I make a final decision, I usually check:

  • Supported SSD type and size
  • USB4 or Thunderbolt compatibility
  • Maximum speed and real-world performance
  • Cooling design
  • Build quality
  • Ease of installation
  • Compatibility with my operating system

My Final Buying Advice

If I want a fast, expandable, and modern SSD enclosure, the Terramaster D4 SSD 4-bay M.2 USB4 enclosure is worth serious consideration. I would choose it if I needed high-speed storage with multiple drives in one compact unit. For me, the best purchase is the one that balances speed, compatibility, cooling, and convenience—and this enclosure can be a strong fit if those are my priorities.

Final Thoughts

In my view, the Terramaster D4 SSD 4-bay M.2 USB4 enclosure is a strong option if you want fast, flexible external storage in a compact package. I like that it combines solid performance with a practical four-drive design, making it useful for creators, professionals, and anyone who needs dependable high-speed expansion. My takeaway is that it offers a good balance of speed, capacity, and convenience, especially if you already work in a USB4 setup.

Author Profile

Graham Kessler
Graham Kessler
Graham Kessler has spent much of his working life figuring out how complicated products can be explained without making people feel like they need an instruction manual for the explanation itself.

Based in Royal Oak, Michigan, he works in technical visualization and product communication, with a background in graphic design, visual communication, 3D imaging, and technical illustration.

Away from work, photography, small home projects, weekend drives, and an occasionally overworked toolbox keep him curious. Through QuintekGroup.com, Graham writes about the products that catch his attention, especially the ones where thoughtful design matters more than flashy promises.