---
product_id: 466046320
title: "ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with 、USB4/USB3.2/3.1/3.0/2.0, M.2 Enclosure Support 2280/2260/2242/2230 (TBU405)"
brand: "freegene"
price: "€ 108.52"
currency: EUR
in_stock: true
reviews_count: 8
category: "Freegene"
url: https://www.desertcart.ie/products/466046320-acasis-40gbps-m-2-nvme-ssd-enclosure-tbu-405-m1
store_origin: IE
region: Ireland
---

# 40Gbps blazing transfer speed Compact, travel-ready design Advanced heat dissipation tech ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with 、USB4/USB3.2/3.1/3.0/2.0, M.2 Enclosure Support 2280/2260/2242/2230 (TBU405)

**Brand:** freegene
**Price:** € 108.52
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock Thunderbolt Power: Speed, Stability & Style in Your Pocket!

## Quick Answers

- **What is this?** ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with 、USB4/USB3.2/3.1/3.0/2.0, M.2 Enclosure Support 2280/2260/2242/2230 (TBU405) by freegene
- **How much does it cost?** € 108.52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/466046320-acasis-40gbps-m-2-nvme-ssd-enclosure-tbu-405-m1)

## Best For

- freegene enthusiasts

## Why This Product

- Trusted freegene brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Optimized Thermal Management:** Premium aluminum alloy body and smart heat dissipation keep your SSD cool during marathon data transfers—no throttling, no downtime.
- • **Sleek, Pocket-Sized Portability:** Engineered for the on-the-go professional, this lightweight enclosure fits easily in your bag for business trips or remote work.
- • **Blazing 40Gbps Thunderbolt Speed:** Experience near-internal SSD speeds with up to 2805MB/s read and 2734MB/s write—perfect for demanding workflows.
- • **Universal Multi-Device Compatibility:** Effortlessly connects with M1/M2 Pro/Max Macs, iPad Pro, Windows, macOS, and Linux—your all-in-one storage solution.
- • **JHL7440 Certified Dual-Chip Stability:** Industry-leading chipset ensures rock-solid reliability and seamless compatibility across USB4/3.2/3.1/3.0/2.0 devices.

## Overview

The ACASIS 40Gbps M.2 NVMe SSD Enclosure (TBU405) is a high-performance external storage solution designed for professionals demanding ultra-fast data transfer and reliable operation. Featuring the Intel JHL7440 dual-chip chipset, it supports Thunderbolt 3/4 and USB4/3.2/3.1/3.0/2.0 interfaces, delivering up to 2805MB/s read and 2734MB/s write speeds. Compatible with a wide range of devices including M1/M2 Pro/Max Macs, iPad Pro, Windows, macOS, and Linux systems, it supports multiple M.2 SSD sizes (2280/2260/2242/2230). Its compact, durable aluminum design ensures excellent heat dissipation, making it ideal for intensive tasks like 4K/6K video editing and large file transfers while on the move.

## Description

desertcart.com: ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with 、USB4/USB3.2/3.1/3.0/2.0, M.2 Enclosure Support 2280/2260/2242/2230 (TBU405) : Electronics

Review: A Thorough Testing Reveals that This Is A Thunderbolt 3/4 Drive with 3,000 MB/s Speeds - WHAM! - Wow! What a few weeks it has been. For some, my initial review was blunt and critical. I had a unit arrive that initially worked, albeit slowly and not as expected. Soon after, the unit stopped responding and wouldn't mount a drive. I thought this product was garbage. However, I did some very thorough research. The product I received had been used before, and I unknowingly thought it was a new product. To summarize a very long story, the prior user did not insert the SSD in correctly, damaging the connector component and cracking (a few at least) solder joints that was making it work initially, but then as heat was applied the cracks became more apparent through thermal expansion, and BAM! The unit was dead. I initially thought this was a product malfunction, but this turns out to be on desertcart's side by returning used products and placing them as new. I had a lengthy conversation with the seller, and they are working with desertcart to ensure these things don't happen again. I agreed with them, that when you buy a new product, you should expect a new product, and not something that has been used before only for desertcart to throw it back on the shelf. This has apparently increased in frequency with desertcart, and thus this places blame squarely on them. Therefore, my review is below as I returned the defective unit, and bought a brand new one that I was able to test out. Like many of you, NVMe Enclosures are not a completely new idea, but they have remarkably increased in performance in the last year or two. This is because NVMe rely on the PCIe bus which typically is attached to a motherboard, offering the very best and top speeds that the motherboard is capable of handling. When you start moving toward enclosures, they are not "directly" attached to the motherboard, and thus are limited by the cable, receiver technology, and enclosure itself. Whereas USB (and Thunderbolt, for that matter) have promised to simplify this technology, it instead has increased its complexity to confuse all of us! First, you are looking for an enclosure. No surprise you already have a 2280 (think size, 22cm by 80cm SSD "stick", and NOT a SATA stick, don't bother with those anymore) SSD that you want to use, but either don't want to put it into a computer or you have a spare one on hand. That's where these enclosures come in handy; they can utilize the SSD attached to the computer as a "mega USB thumb stick" to increase storage and a whole benefit of other factors. Now, as we discuss speeds, USB sticks are actually surprisingly slow. Even some of the best, expensive ones are only able to pump out 100-200 MB/s write speeds (reading is almost always faster and easier than write). Since you are looking for an enclosure, you should have at least a 3,500 MB/s NVMe SSD that can benefit from a fast enclosure. Simply hook this up to a computer, and you'll get fast read/write speeds. This benefits from large file transfers such as videos, or a database of something like music (I myself have about 300 GB of personal music collection, not streamed). So the usefulness of a 1TB to 2TB SSD attached to the computer helps out your storage, while also performing well for the computer to carry out tasks that is within the extra storage space you are using. Enter ACASIS Thunderbolt enclosure. You'll see that it has the (not latest, but best) Intel JHL 7440 Chipset. You want this chipset because it is capable of Thunderbolt 3 (and Thunderbolt 4 for a Mac, a bit more about that difference in a second). This chipset gives you the capability to read and translate that data on the SSD to be sent to the computer. Next, you need the proper cable. Not just any cable with USB-C connections on each end. You need a cable that is capable of transferring that data from the enclosure to the computer. Any old "charging USB-C" cable won't do, they are for charging and NOT necessarily for data transfer. The cable that comes with this unit is meant for Thunderbolt 3/4, so this cable is good (and spendy). If you need a longer one, they don't make super long ones simply because the longer cable that you use, more interference is introduced and drastically reduces the speeds. Best to keep your cables short! Once you have the SSD, the enclosure, and the cable, you can now connect it to your computer or your laptop. The best benefits will be realized by a laptop as this enclosure is easy to carry around, does not weigh much, and performs WAY BETTER than any kind of mechanical drive that you plug into a laptop. This gives you the extra storage space you are looking for. Maybe for video editing, carrying around your music or photo collection, or even a backup that will be quick to backup any files that you need. This enclosure gives you that flexibility to use at your will, and giving performance similar to another SSD that is plugged into your motherboard. I installed both a 2TB WD SN850X and a 2TB Samsung 980 PRO (both are very good SSD's with fast read/write speeds) to test out the capability of these enclosures. I used a new Mac Mini M2 Pro and used a hard drive speed test software. Speeds were about the same between both SSD's, so the enclosure is pulling the best that it can from each SSD's. Even though these SSD's are capable of over 7,000 MB/s, the limiting factor is what Thunderbolt can do, and that is a theoretical rate of 40Gbps. But I'm going to clarify some negative reviews here with some technical know-how: First, remember that speeds are theoretical bandwidth speeds, and almost never reach those speeds. Think USB 2.0 and how everyone thought it was mega-fast at 480 Mbps, but it never got close to that. Know why? Because everyone kept trying to use mechanical drives, and they simply just can't perform like an SSD could back in the day, so speeds were still seemingly slow (still way better than USB 1.1!). Second, Thunderbolt (and USB 4.0) still have to have bandwidth reserved for display output. That means that the 40Gbps capable speeds still has about 16Gbps of reserved bandwidth for display carry-through. So yes, 40Gbps would yield over 5,000 MB/s, but you're not going to get that no matter what you do. So the best you can get is about 24Gbps, which is about 3,000 MB/s and that's exactly what this unit can do. I have not seen any other enclosure that can beat the performance of this one, simply as the best chipset right now is the JHL 7440 which will cap out data transfers at about 24Gbps (surprise!). Still, 3,000 MB/s is still VERY good, and you HAVE to remember that this is not directly connected to the motherboard, so you're not going to see 7,500 MB/s transfer speeds simply because you are not directly connected to the fastest bus on the computer. External connections are never really going to be faster than internal circuitry, so stop believing that somehow, magically, you can. Just isn't reality. So with that in mind, the enclosure can get warm with TONS of data transfers (how often are you going to transfer TB's of information back and forth? Yea, not much), so the heat dissipation is good. I found out that the hottest my unit could get was about 110 degrees F after moving 4TB of data back and forth, which is not bad at all. I also keep the heat down because it sits on top of the aluminum body of the Mac Mini, which helps pull heat out of the unit. The enclosure is a well machined block of aluminum alloy, so it is capable of heat transfer if you give it a medium to do that. Air is not exactly the best conductor, so sitting on top of a towel will not dissipate as much heat as you would if you placed it on a thick, solid metal surface, or even a cold, flat desk that can help pull some heat from the unit. To be fair though, it will only get hot with a LOT of work, and even then I noticed that it cools down fairly quickly, so heat is not really an issue with this unit. Lastly, I went beyond and wired up two of these units to give a real-world demonstration of a RAID setup (Google RAID if you need to learn about it, you'll want to if you haven't heard of it, RAID can be awesome). Using the same Mac Mini, I took two SSD's and two of these ACASIS enclosures, and set them up as a RAID 0 drive using Stripe. Now, I've taken two 2TB drives and created one single 4TB drive. As one transmits info, the other is getting ready to transmit, so they both work in harmony that essentially doubles your bandwidth. Behold, my 3,000 MB/s speed tests now turned into 6,000 MB/s speeds! That's the WOW factor that is needed. Overall, for about $100, this enclosure will beat the socks off of any of those "other" $20 or $40 enclosures. The JHL 7440 chip itself is expensive, not to mention the cable that is actually capable of full data transfer is not cheap either. Hence, the price is getting something worth paying for. You think USB 3.0 speeds are fast at 5Gbps? Try transferring a 30GB file and see the difference. Personally, I used a 30GB Photos library, which is a good test because it has hundreds of thousands of files, plus a large 30GB data chunk size, that is perfect to test a transfer rate. I moved 30GB in less than 30 seconds. Yes, half a minute. You read that right. How? Because I used my internal Mac Mini SSD with speeds of 3,500 MB/s and my RAID drive capable of 6,000 MB/s, and it transferred a large 30GB file that quickly. Just. Screamin'. Fast. So, to realize the full potential of this, you need to ensure that you have the right SSD, the right enclosure (this one), and the right cable (comes included). Now you are ready to play with power! Pic 1: Speeds of the enclosure using Samsung 980 PRO Pic 2: Detailed breakdown of Thunderbolt connection, 40 Gbps Pic 3: Box unit arrived it Pic 4: Internal Mac SSD, notice the speeds of ACASIS enclosure is near internal SSD speeds! Pic 5: Buy two of these, use RAID to combine the SSD's together for a whopping 6,000 MB/s!!!!
Review: So Far So Good - I bought this ACASIS 40Gbps M.2 NVMe SSD Enclosure to install a 4TB Crucial NVMe SSD, and I’ve been using it intensively for video editing (4K, 6K RAW) and professional photography workflows. After more than two years of regular use, it has been very reliable. The enclosure delivers excellent speeds, fully taking advantage of the NVMe SSD. I work directly from the drive with large RAW video files and high-resolution photo libraries, and performance has been consistently smooth and stable. The cooling fan works well and does its job. I haven’t experienced overheating, throttling, disconnects, or system crashes. The fan is noticeable but not problematic, especially considering the workload and sustained transfers. Build quality feels solid, installation was straightforward, and overall it has proven to be a dependable tool for demanding creative work. So far, no issues at all.

## Features

- LIGHTENING-FAST 40Gbps. Speed test with Samsung 980 EVO Plus on Macbook Pro, the Read / Write speed of ACASIS 40Gbps nvme enclosure reaches up to 2805MB/s / 2734MB/s(Different speed may vary from different system).
- JHL7440 CERTIFIED CHIP: Dual chip control, more stable and reliable, better heat dissipation, fully compatible with USB 4/3.2/3.1/3.0/2.0.（Note：SSD NOT INCLUDE）
- UNIVERSAL COMPATIBILITY: This M.2 NVMe Enclosure supports M1 Pro/Max Mac devices and iPad Pro.Compatible with Windows, macOS and Linux. Compatible with USB 4/3.2/ 3.1/ 3.0/ 2.0 at respective speed limits to meet a variety of work and daily needs.
- POCKET SIZE TRAVEL-FRIENDLY: This compact design make TBU 405 easy to be carried in a handbag or pocket, nice for travel &business trips.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BBZT42HC |
| Best Sellers Rank | #26 in Enclosures |
| Compatible Devices | Laptop |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,111) |
| Data Transfer Rate | 600 Megabytes Per Second |
| Date First Available | August 26, 2022 |
| Hard Disk Form Factor | 2.5 Inches |
| Item Weight | 5.6 ounces |
| Item model number | TBU405 |
| Manufacturer | FREEGENE |
| Max Number of Supported Devices | 1 |
| Memory Storage Capacity | 8 TB |
| Product Dimensions | 3.96 x 1.92 x 0.6 inches |

## Product Details

- **Brand:** FREEGENE
- **Hardware Interface:** USB
- **Hardware Platform:** Windows
- **Material:** Aluminum
- **Product Dimensions:** 3.94"L x 2.4"W x 0.57"H

## Images

![ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with 、USB4/USB3.2/3.1/3.0/2.0, M.2 Enclosure Support 2280/2260/2242/2230 (TBU405) - Image 1](https://m.media-amazon.com/images/I/71HczCYLl3L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this the newest model or is there a newer model out?**
A: who can tell what's truthful, with all this bogus 40Gbps USB4 marketing documentation.
the ACASIS site presently states this TBU405 contains "Intel® JHL7440 Thunderbolt™3 with REALTEK® RTL9210B"
that USB interface chip RTL9210B is USB 3.1 • 10Gbps.
but the Q&A here states it's a different chip JMS583 with that same lowly USB 3.1 • 10Gbps.

the ACASIS tool-less model TBU401 is now shipping with TBU401e on the box.  "e".
but that Amazon sales page and the ACASIS online marketing page don't mention anything about that "e" model update.
it's also documented to contain a RTL9210B chip.  but a video shows it formerly contained a JMS583.
https://www.amazon.com/ask/questions/Tx220PG5HNIY0I3

so.  what you see here might NOT be what you get.
.

**Q: Looking for those who have tried a wd sn850x gen4 in this tbu-405 enclosure. all work well? any performance drop / fails? does it handle gen4 well?**
A: based on below details
• there is adequate power supplied by TB.
• but insufficient power from native USB.

google online image of this WD SN850X sticker shows 3.3V x 2.8A = 9.24 watts.
M.2 specification 1.0 states its max power limit is 8.25 watts.
that's a little puzzling isn't it?

this enclosure's Intel JHL7440 Thunderbolt3 chip datasheet average TDP power is stated to be 2.4W
exactly how much more power this enclosure requires isn't disclosed.
9.24 + 2.4 = 11.64 watts

native USB4 per published specification can supply only 7.5W
(for x2 lane, only 4.5W for USB x1 lane)
Thunderbolt3/4 specs are not publicly available, but unqualified online claims say 15W


------------------------------------
regarding speed of this Gen4 7300 MB/s SSD
it can get only approx 2750 MB/s in this Gen3 enclosure.

if you're happy with that substandard performance from Gen4, very good
but it's not even Gen3 top speed.

**Q: What is the difference between acasis tbu401 & tbu405?**
A: according to the Seller in that ad, the two models have the exact same chipset.
so the functional difference would seemingly be only that the 401 is tool-less.

https://www.amazon.com/ask/questions/Tx220PG5HNIY0I3

**Q: Compatible with Samsung 980 or 990 Pro?**
A: Yes, I have the 1TB Samsung 980 Pro running  in my Acasis case  with no problems on either MacBook Pro or Mac Mini Pro.

## Customer Reviews

### ⭐⭐⭐⭐⭐ A Thorough Testing Reveals that This Is A Thunderbolt 3/4 Drive with 3,000 MB/s Speeds - WHAM!
*by A***B on November 23, 2023*

Wow! What a few weeks it has been. For some, my initial review was blunt and critical. I had a unit arrive that initially worked, albeit slowly and not as expected. Soon after, the unit stopped responding and wouldn't mount a drive. I thought this product was garbage. However, I did some very thorough research. The product I received had been used before, and I unknowingly thought it was a new product. To summarize a very long story, the prior user did not insert the SSD in correctly, damaging the connector component and cracking (a few at least) solder joints that was making it work initially, but then as heat was applied the cracks became more apparent through thermal expansion, and BAM! The unit was dead. I initially thought this was a product malfunction, but this turns out to be on Amazon's side by returning used products and placing them as new. I had a lengthy conversation with the seller, and they are working with Amazon to ensure these things don't happen again. I agreed with them, that when you buy a new product, you should expect a new product, and not something that has been used before only for Amazon to throw it back on the shelf. This has apparently increased in frequency with Amazon, and thus this places blame squarely on them. Therefore, my review is below as I returned the defective unit, and bought a brand new one that I was able to test out. Like many of you, NVMe Enclosures are not a completely new idea, but they have remarkably increased in performance in the last year or two. This is because NVMe rely on the PCIe bus which typically is attached to a motherboard, offering the very best and top speeds that the motherboard is capable of handling. When you start moving toward enclosures, they are not "directly" attached to the motherboard, and thus are limited by the cable, receiver technology, and enclosure itself. Whereas USB (and Thunderbolt, for that matter) have promised to simplify this technology, it instead has increased its complexity to confuse all of us! First, you are looking for an enclosure. No surprise you already have a 2280 (think size, 22cm by 80cm SSD "stick", and NOT a SATA stick, don't bother with those anymore) SSD that you want to use, but either don't want to put it into a computer or you have a spare one on hand. That's where these enclosures come in handy; they can utilize the SSD attached to the computer as a "mega USB thumb stick" to increase storage and a whole benefit of other factors. Now, as we discuss speeds, USB sticks are actually surprisingly slow. Even some of the best, expensive ones are only able to pump out 100-200 MB/s write speeds (reading is almost always faster and easier than write). Since you are looking for an enclosure, you should have at least a 3,500 MB/s NVMe SSD that can benefit from a fast enclosure. Simply hook this up to a computer, and you'll get fast read/write speeds. This benefits from large file transfers such as videos, or a database of something like music (I myself have about 300 GB of personal music collection, not streamed). So the usefulness of a 1TB to 2TB SSD attached to the computer helps out your storage, while also performing well for the computer to carry out tasks that is within the extra storage space you are using. Enter ACASIS Thunderbolt enclosure. You'll see that it has the (not latest, but best) Intel JHL 7440 Chipset. You want this chipset because it is capable of Thunderbolt 3 (and Thunderbolt 4 for a Mac, a bit more about that difference in a second). This chipset gives you the capability to read and translate that data on the SSD to be sent to the computer. Next, you need the proper cable. Not just any cable with USB-C connections on each end. You need a cable that is capable of transferring that data from the enclosure to the computer. Any old "charging USB-C" cable won't do, they are for charging and NOT necessarily for data transfer. The cable that comes with this unit is meant for Thunderbolt 3/4, so this cable is good (and spendy). If you need a longer one, they don't make super long ones simply because the longer cable that you use, more interference is introduced and drastically reduces the speeds. Best to keep your cables short! Once you have the SSD, the enclosure, and the cable, you can now connect it to your computer or your laptop. The best benefits will be realized by a laptop as this enclosure is easy to carry around, does not weigh much, and performs WAY BETTER than any kind of mechanical drive that you plug into a laptop. This gives you the extra storage space you are looking for. Maybe for video editing, carrying around your music or photo collection, or even a backup that will be quick to backup any files that you need. This enclosure gives you that flexibility to use at your will, and giving performance similar to another SSD that is plugged into your motherboard. I installed both a 2TB WD SN850X and a 2TB Samsung 980 PRO (both are very good SSD's with fast read/write speeds) to test out the capability of these enclosures. I used a new Mac Mini M2 Pro and used a hard drive speed test software. Speeds were about the same between both SSD's, so the enclosure is pulling the best that it can from each SSD's. Even though these SSD's are capable of over 7,000 MB/s, the limiting factor is what Thunderbolt can do, and that is a theoretical rate of 40Gbps. But I'm going to clarify some negative reviews here with some technical know-how: First, remember that speeds are theoretical bandwidth speeds, and almost never reach those speeds. Think USB 2.0 and how everyone thought it was mega-fast at 480 Mbps, but it never got close to that. Know why? Because everyone kept trying to use mechanical drives, and they simply just can't perform like an SSD could back in the day, so speeds were still seemingly slow (still way better than USB 1.1!). Second, Thunderbolt (and USB 4.0) still have to have bandwidth reserved for display output. That means that the 40Gbps capable speeds still has about 16Gbps of reserved bandwidth for display carry-through. So yes, 40Gbps would yield over 5,000 MB/s, but you're not going to get that no matter what you do. So the best you can get is about 24Gbps, which is about 3,000 MB/s and that's exactly what this unit can do. I have not seen any other enclosure that can beat the performance of this one, simply as the best chipset right now is the JHL 7440 which will cap out data transfers at about 24Gbps (surprise!). Still, 3,000 MB/s is still VERY good, and you HAVE to remember that this is not directly connected to the motherboard, so you're not going to see 7,500 MB/s transfer speeds simply because you are not directly connected to the fastest bus on the computer. External connections are never really going to be faster than internal circuitry, so stop believing that somehow, magically, you can. Just isn't reality. So with that in mind, the enclosure can get warm with TONS of data transfers (how often are you going to transfer TB's of information back and forth? Yea, not much), so the heat dissipation is good. I found out that the hottest my unit could get was about 110 degrees F after moving 4TB of data back and forth, which is not bad at all. I also keep the heat down because it sits on top of the aluminum body of the Mac Mini, which helps pull heat out of the unit. The enclosure is a well machined block of aluminum alloy, so it is capable of heat transfer if you give it a medium to do that. Air is not exactly the best conductor, so sitting on top of a towel will not dissipate as much heat as you would if you placed it on a thick, solid metal surface, or even a cold, flat desk that can help pull some heat from the unit. To be fair though, it will only get hot with a LOT of work, and even then I noticed that it cools down fairly quickly, so heat is not really an issue with this unit. Lastly, I went beyond and wired up two of these units to give a real-world demonstration of a RAID setup (Google RAID if you need to learn about it, you'll want to if you haven't heard of it, RAID can be awesome). Using the same Mac Mini, I took two SSD's and two of these ACASIS enclosures, and set them up as a RAID 0 drive using Stripe. Now, I've taken two 2TB drives and created one single 4TB drive. As one transmits info, the other is getting ready to transmit, so they both work in harmony that essentially doubles your bandwidth. Behold, my 3,000 MB/s speed tests now turned into 6,000 MB/s speeds! That's the WOW factor that is needed. Overall, for about $100, this enclosure will beat the socks off of any of those "other" $20 or $40 enclosures. The JHL 7440 chip itself is expensive, not to mention the cable that is actually capable of full data transfer is not cheap either. Hence, the price is getting something worth paying for. You think USB 3.0 speeds are fast at 5Gbps? Try transferring a 30GB file and see the difference. Personally, I used a 30GB Photos library, which is a good test because it has hundreds of thousands of files, plus a large 30GB data chunk size, that is perfect to test a transfer rate. I moved 30GB in less than 30 seconds. Yes, half a minute. You read that right. How? Because I used my internal Mac Mini SSD with speeds of 3,500 MB/s and my RAID drive capable of 6,000 MB/s, and it transferred a large 30GB file that quickly. Just. Screamin'. Fast. So, to realize the full potential of this, you need to ensure that you have the right SSD, the right enclosure (this one), and the right cable (comes included). Now you are ready to play with power! Pic 1: Speeds of the enclosure using Samsung 980 PRO Pic 2: Detailed breakdown of Thunderbolt connection, 40 Gbps Pic 3: Box unit arrived it Pic 4: Internal Mac SSD, notice the speeds of ACASIS enclosure is near internal SSD speeds! Pic 5: Buy two of these, use RAID to combine the SSD's together for a whopping 6,000 MB/s!!!!

### ⭐⭐⭐⭐⭐ So Far So Good
*by E***D on January 31, 2026*

I bought this ACASIS 40Gbps M.2 NVMe SSD Enclosure to install a 4TB Crucial NVMe SSD, and I’ve been using it intensively for video editing (4K, 6K RAW) and professional photography workflows. After more than two years of regular use, it has been very reliable. The enclosure delivers excellent speeds, fully taking advantage of the NVMe SSD. I work directly from the drive with large RAW video files and high-resolution photo libraries, and performance has been consistently smooth and stable. The cooling fan works well and does its job. I haven’t experienced overheating, throttling, disconnects, or system crashes. The fan is noticeable but not problematic, especially considering the workload and sustained transfers. Build quality feels solid, installation was straightforward, and overall it has proven to be a dependable tool for demanding creative work. So far, no issues at all.

### ⭐⭐⭐⭐⭐ Easy to install. Run cool (when you turn on the included fan).
*by B***N on November 6, 2025*

All of the data on my Mac Studio now resides on SSD, including Time Machine backups. This may sound like overkill (and it is, sort of), but one thing I hate is waiting for a sleeping hard drive to SPIN UP. No more waiting. I have 3 Acasis SSD enclosures, housing a total of 16TB worth a SSD storage. Plus the built in SDD inside the Mac Studio. All of my data and backups reside on the external SSDs hosted in Acasis exclosures. The only things on the Mac SSD are: Mac-OS, Applications, and the Downloads folder. My data is mine, and I keep it outside of the Mac. I have the smallest SSD you can get on a Mac Studio (0.5 TB) which is currently about half used. The Acasis enclosures have built-in fans, and they run cool all the time. The cost to populate the SSD farm was about the same as I paid for the Mac Studio itself, but well worth it. When I hit the ESC key to wake up the computer, there is no sound. The computer wakes up and is ready to go in less than 5 sec. And that's with two screens that need waking. The Acasis enclosures are TB4 instead of TB5. This is because TB4 is plenty fast enough for random access I/O. The stats quoted for TB5 are mostly for sequential I/O for large files. Unfortunately, most of the computing tasks that 99% of people run 99% of the time, have nothing at all to do with sequential I/O for large files. Anyways, the Acasis SSD enclosures are top notch, easy to install, and they run cool and trouble free. Would recommend. Would buy again, no question.

## Frequently Bought Together

- ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU405 for M1 M2 Pro/Max, Compatible with Thunderbolt 4/3/USB3.2/3.1/3.0/2.0, M.2 Enclosure Support SSD 2280/2260/2242/2230 B+M M-Key
- Samsung 990 PRO SSD NVMe M.2 PCIe Gen4, M.2 2280 Internal Solid State Hard Drive, Seq. Read Speeds Up to 7,450 MB/s for High End Computing, Gaming, and Heavy Duty Workstations, MZ-V9P2T0B/AM

---

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-16*