---
product_id: 521777086
title: "- ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key"
brand: "freegene"
price: "₨4010"
currency: SCR
in_stock: true
reviews_count: 7
category: "Freegene"
url: https://www.desertcart.sc/products/521777086-acasis-40gbps-m-2-nvme-ssd-enclosure-tbu-405-m1
store_origin: SC
region: Seychelles
---

# 40Gbps blazing speed Compact pocket-sized design Universal USB4/3.x compatibility - ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key

**Brand:** freegene
**Price:** ₨4010
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock lightning-fast storage on the move — because speed waits for no one!

## Quick Answers

- **What is this?** - ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key by freegene
- **How much does it cost?** ₨4010 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/521777086-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

- • **Travel-Ready Pocket Size:** Sleek, lightweight aluminum enclosure fits effortlessly in your bag or pocket — perfect for on-the-go professionals.
- • **Dual-Chip Stability & Cooling:** JHL7440 certified dual-chip controller ensures rock-solid performance and superior heat dissipation for nonstop productivity.
- • **Premium Build & Cable Quality:** Robust aluminum body paired with a high-quality cable means durability and reliability you can trust every day.
- • **Blazing 40Gbps Thunderbolt Speed:** Experience ultra-fast data transfers up to 2805MB/s read and 2734MB/s write — no more waiting around.
- • **Seamless Cross-Platform Compatibility:** Works flawlessly with M1/M2 Pro/Max Macs, iPad Pro, Windows, macOS, and Linux via USB4/3.2/3.1/3.0/2.0.

## Overview

The ACASIS TBU 405 is a premium M.2 NVMe SSD enclosure delivering up to 40Gbps transfer speeds with JHL7440 dual-chip technology. Compatible with USB4 and earlier standards, it supports M1/M2 Pro/Max Macs, iPad Pro, Windows, macOS, and Linux. Its compact aluminum design ensures portability and excellent heat dissipation, making it ideal for professionals demanding fast, reliable external storage on the go.

## Description

ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key : desertcart.in: Computers & Accessories

Review: 2700 Read speed with Cheap WD SN570, it is super special - It was bought from desertcart US. It is costly and if you look into the reviews and ads, I am supposed to get good speed from latest and costliest SSD. I had doubts because Internal chip uses older pcie 3.0. Now tested and found out that even with my cheap 1Tb WD SN570 from desertcart, I am getting over 2200MB/s read write. Values are in attached Screenshot. It is twice faster than any USB 3.2 Gen 2, faster than my Mac mini M2 256GB that it attached to. Very good. Serves more than I need.
Review: Acacis 40GB Enclosure - Bought this and it works well. The cable on this enclosure ie much better than the other enclosures I have bought. Has no fan and is on even when the Mac mini M4 is shut.

## 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 |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #153,146 in Electronics ( See Top 100 in Electronics ) #169 in Enclosures |
| Compatible Devices | Laptop |
| Connectivity Technology | Thunderbolt, USB |
| Country of Origin | USA |
| Customer Reviews | 4.3 4.3 out of 5 stars (539) |
| Data Transfer Rate | 600 Megabytes Per Second |
| Date First Available | 2 September 2022 |
| Digital storage capacity | 1024 GB |
| Does it contain liquid? | No |
| Flash Memory Installed Size | 1 TB |
| Form Factor | M.2 |
| Hard Disk Description | solid state |
| Hard Disk Form Factor | 2.5 Inches |
| Hard Drive Interface | NVMe |
| Hard Drive Size | 1 TB |
| Item Dimensions LxWxH | 10.1 x 4.9 x 1.5 Centimeters |
| Item Weight | 159 g |
| Item model number | TBU405 |
| Manufacturer | FREEGENE |
| Material | Aluminium |
| Max Number of Supported Devices | 1 |
| Memory Storage Capacity | 8 TB |
| Model | TBU405 |
| Model Name | 970 EVO Plus |
| Mounting Hardware | enclosure |
| Number of items | 1 |
| Product Dimensions | 10.06 x 4.88 x 1.52 cm; 159 g |
| Special Features | Compact |

## Product Details

- **Brand:** FREEGENE
- **Colour:** Space grey
- **Hardware Interface:** USB
- **Hardware Platform:** Windows
- **Product Dimensions:** 10L x 6.1W x 1.5H Centimeters

## Images

![- ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key - Image 1](https://m.media-amazon.com/images/I/71HczCYLl3L.jpg)

## Available Options

This product comes in different **Model** 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

### ⭐⭐⭐⭐⭐ 2700 Read speed with Cheap WD SN570, it is super special
*by N***� on 18 June 2023*

It was bought from Amazon US. It is costly and if you look into the reviews and ads, I am supposed to get good speed from latest and costliest SSD. I had doubts because Internal chip uses older pcie 3.0. Now tested and found out that even with my cheap 1Tb WD SN570 from Amazon, I am getting over 2200MB/s read write. Values are in attached Screenshot. It is twice faster than any USB 3.2 Gen 2, faster than my Mac mini M2 256GB that it attached to. Very good. Serves more than I need.

### ⭐⭐⭐⭐ Acacis 40GB Enclosure
*by J***H on 28 October 2025*

Bought this and it works well. The cable on this enclosure ie much better than the other enclosures I have bought. Has no fan and is on even when the Mac mini M4 is shut.

### ⭐⭐⭐⭐ Review
*by A***ー on 1 August 2023*

「MP600 PRO XT CSSD-F8000GBMP600PXT」を内蔵して使っています。8TB と正常に認識されています。このNVMEは両面実装なので、その配慮もあると、もっと良かったです。

## 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 Seychelles*
*Store origin: SC*
*Last updated: 2026-03-12*