TBU405M1 VS TBU405Pro
TBU405 is base version (Tool-free Installation), while TBU405Pro (Tool-free Installation + Built-in Silent Fan) is an upgraded version of TBU405. The main difference is that TBU405Pro is additionally equipped with a built-in silent cooling fan.
According to tests conducted by the ACASIS laboratory, after continuous use for 1 hour, the internal SSD temperature of TBU405Pro remained as low as 35°C, providing robust protection for your valuable data.
40Gbps Ultra-Fast Transfer Rate
In tests conducted at the ACASIS laboratory using a 2TB Samsung 980 Pro SSD and a MacBook Pro, the ACASIS 40Gbps NVMe SSD enclosure read/write speeds reaches up to 2805MB/s / 2734MB/s.
Note: Don’t buy SSDs with heatsinks. Choose SSD capacity based on your needs.
Dual-Chip Design for Dual Stability
Unlike other enclosures that use the ASMedia® AMS2464 chip, ACASIS adopts a dual-chip design, ensuring backward compatibility with Thunderbolt 5/4/3 and USB4/3.2/3.1/3.0/2.0. The JHL7440 chip and the REALTEK® RTL9210B chip are perfectly combined, ensuring stable and smooth data transfer. The JHL7440 chip serves as the main controller, supporting up to 40Gbps ultra-fast transfer rates.
Multiple Heat Dissipation
The built-in cooling fan, aluminum alloy shell with corrugated surface and thermal pad work together for quadruple heat dissipation effect, protecting the SSD from overheating while reducing power consumption and ensure great performance all along.
Tool-Free Installation, Plug and Play
No more worries about losing screws. The ACASIS storage enclosure features a tool-free design, supporting M-key and B+M key any size PCIe NVMe SSDs. No driver installation or external power supply is required, truly achieving plug-and-play functionality.
*TBU405PRO supports up to 8TB of SSD.
The above data are the results of speed tests conducted by Acasis Labs. The speed obtained may vary depending on the SSD used, file formats, and operating systems.
Easy to Carry
The ACASIS 40Gbps NVMe SSD enclosure is only the size of a iphone and weighs about the same as an apple. You can simply slip it into your pocket or briefcase, allowing you to meet your need for efficient and reliable storage while on the go.

Whether you’re transferring large files, editing high-resolution images or video, or just need a reliable and efficient storage solution, the ACASIS 40Gbs M.2 NVME SSD enclosure has you covered. So why wait?
Upgrade your workflow today and experience the power and speed of the ACASIS 40Gbs M.2 NVME SSD SSD enclosure!
FAQ
TBU405Air is only compatible with USB4 interfaces, not USB 3.2/3.1/3.0/2.0.
TBU405M1/TBU405Pro is not only compatible with USB4 interfaces, but also backward compatible with USB 3.2/3.1/3.0/2.0.
Compared with TBU405M1, TBU405Pro has an additional cooling fan and is larger in size.
Different SSDs, different interface protocols, and different computer configurations will have different speeds.
Use the Switch to control the fan: 1. After connecting, press the switch to start the fan; 2. Press it again to turn off the fan.
When the iPhone 15 pro max is directly connected to the enclosure, there may be insufficient power supply, resulting in unrecognition.
We have these two methods to help you to recognize the SSD on iPhone 15 pro max.
1. It needs to use a 10Gbps data cable. The Thunderbolt 3/4 cables do not support it;
2. It needs to be connected to a docking station and powered to be recognized.
The solution was to go to
Device Manager>Disk Drive>select drive>Properties>Policies>turn on write cache
Disk performance settings.
1. right-click this computer ==> select Manage
2. Select: Disk Management ==> Select the target disk, right-click the mouse and select Properties
3. Select strategy == “Select better performance, enable write cache on the device and click OK, the disk achieves the best performance.
If the performance boost of the disk has been set but the performance boost is still not effective, don’t worry.
It is recommended that you first check whether the ahci mode of your computer is on and whether the Intel RST driver is installed.
If the above settings are completed, but the problem still occurs, you can change to another computer to check whether the read and write is normal.


















Arjun Mehta –
The plug-and-play setup was effortless. no drivers needed and it was recognized instantly on both Mac and Windows.
Nikhil Verma –
Fantastic performance for creative professionals. stable, fast and easy to use.
Priya Singh –
Compact and durable enclosure with reliable performance. Great for travel and everyday use.
Tanya Kapoor –
Worked perfectly right out of the box with both USB4 and Thunderbolt ports.
Divya Menon –
Heat-dissipating aluminum case and built-in fan keeps everything running cool and stable.
Kshitij Gupta –
Supports Thunderbolt 3/4 and USB4. very versatile with multiple devices.
Karan Sharma –
Ideal for transferring large video projects. hits close to 40 Gbps with a good NVMe SSD installed.
Harsh Bhatia –
Seamless data transfers and consistent high speeds during backups.
Rohit Malhotra –
A sleek, high-performance SSD enclosure that lives up to the 40 Gbps speeds.
Sanya Rao –
Plug-and-play with Windows and macOS. no setup pain at all.
Yash Desai –
Excellent speeds even with heavy workloads. clearly built for professionals.
Ria Patel –
Super fast data transfer and the integrated cooling fan keeps my SSD running cool even under heavy workloads.
Meera Joshi –
Excellent build quality with great heat dissipation. the fan works quietly and effectively.
Shruti Gupta –
Thunderbolt 4 compatibility gives blazing speeds. great for my high-resolution media backups.
Ajay Pillai –
The cooling enhancements really matter. no thermal throttling on long transfer sessions.
Neha Kulkarni –
The enclosure feels premium and sturdy. great for frequent use.
Aditya Nair –
Connects instantly. my system could access the drive without any issues.
Arnav Shah –
Perfect for backing up my photography library. fast and dependable performance.
Isha Bhatt –
Very easy to install and swap SSDs thanks to its tool-free design.
Deepak Rao –
Tool-free installation makes SSD swaps a breeze — saved so much time comparing to other enclosures.
Alisha Deshmukh –
Supports up to 8 TB SSD. perfect choice for expanding my external storage capacity.
Pallavi Singh –
Quiet fan operation with noticeable cooling benefits during heavy workflows.
Vikram Jain –
Great for video editors. transferring large files is super quick.