---
product_id: 621408838
title: "OWC Directly Managed USB4 (USB-C) 40Gbps Express 1M2 External SSD Case Only Maximum Effective Speed 3151MB/s Mac Windows Compatible"
brand: "owc"
price: "¥41278"
currency: JPY
in_stock: true
reviews_count: 8
category: "Owc"
url: https://www.desertcart.jp/products/621408838-owc-directly-managed-usb4-usb-c-40gbps-express-1m2-external
store_origin: JP
region: Japan
---

# Up to 3836MB/s blazing speed Supports NVMe M.2 2230/2242/2280 SSDs up to 16TB+ Patent-pending heat sink for silent cooling OWC Directly Managed USB4 (USB-C) 40Gbps Express 1M2 External SSD Case Only Maximum Effective Speed 3151MB/s Mac Windows Compatible

**Brand:** owc
**Price:** ¥41278
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock next-level speed and silent power for your data on the go!

## Quick Answers

- **What is this?** OWC Directly Managed USB4 (USB-C) 40Gbps Express 1M2 External SSD Case Only Maximum Effective Speed 3151MB/s Mac Windows Compatible by owc
- **How much does it cost?** ¥41278 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/621408838-owc-directly-managed-usb4-usb-c-40gbps-express-1m2-external)

## Best For

- owc enthusiasts

## Why This Product

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

## Key Features

- • **Rock-Solid Reliability:** Backed by a 2-year warranty and built like a tank, it’s the trusted companion for professionals who can’t afford downtime.
- • **Silent, Cool, and Rugged:** Innovative aluminum heat sink design keeps your SSD whisper-quiet and cool under pressure—no fans, no failures.
- • **Plug-and-Play Portability:** Bus-powered and palm-sized, this sleek enclosure goes wherever your productivity demands—no power adapter needed.
- • **Blazing Thunderbolt Speeds:** Experience ultra-fast 40Gbps USB4/Thunderbolt transfers that crush bottlenecks and accelerate your workflow.
- • **Future-Proof DIY Flexibility:** Compatible with all NVMe M.2 SSD sizes and brands, supporting up to 16TB+ capacity for limitless storage expansion.

## Overview

The OWC Express 1M2 is a premium portable NVMe SSD enclosure delivering up to 3836MB/s real-world speeds via USB4/Thunderbolt 40Gbps. Its patent-pending aluminum heat sink ensures silent, efficient cooling without fans, protecting your drive during heavy use. Compatible with all NVMe M.2 SSD sizes (2230, 2242, 2280) and brands, it supports capacities up to 16TB and beyond. Bus-powered and compact, it’s designed for professionals seeking rugged, future-proof, and ultra-fast external storage for both PC and Mac.

## Description

Express 1M2 Ultra-fast, compatible, and reliable portable USB4 NVMe SSD. Build your own or choose ready-to-run solutions.

Review: Incredible Speed and Performance! - I recently purchased the OWC Express 1M2 NVMe Thunderbolt External Drive, and I am beyond impressed! This drive is a game-changer for anyone who needs fast, reliable external storage. The speed is mind-blowing — I'm consistently getting read and write speeds that far surpass anything I’ve experienced with other external drives. The Thunderbolt connectivity ensures lightning-fast data transfer, whether I'm editing large video files or working with heavy datasets. It's perfect for video editors, photographers, or anyone who needs high-performance storage for demanding tasks. The compact design is sleek and portable, making it easy to take with me on the go. I also appreciate the sturdy build quality, which gives me confidence that it's built to last. Setting it up was a breeze, and I had no issues with compatibility on my MacBook Pro and Mac Mini M4. It also stays cool even during extended use, with no noticeable slowdowns or overheating. Overall, this external drive is a fantastic investment. If you're looking for fast, reliable storage with excellent performance, I highly recommend the OWC Express 1M2!
Review: Turn an NVME SSD into a high-performing external drive - UPDATE: note for dock users - If you already have an NVME SSD to hand, this is a cheap(ish) way to turn it into a high performing Thunderbolt external drive. With a WD Black SN770 2TB SSD (pulled out of my desktop PC) inside and connected to my M4 MacBook Air, I can get over 3GBps read and write on this drive - probably difficult to get faster reads and writes than that with an external drive I'd reckon. Mounts fine every time and seems stable - doesn't disconnect when laptop goes to sleep. It was pretty easy to install the drive and it's even supplied with rubber feet for you to install over the screws once you've got the drive installed. The enclosure looks good and keeps the drive relatively cool - it gets warm, but never hot to the touch (even after hours of use). UPDATE: using with a Thunderbolt dock. I tried using this enclosure with several Wavlink Thunderbolt docks, and with each of them the drive only performed in USB 3.2 mode, achieving reads/writes of around 1GBps - much slower than if connected to the Mac directly. After some research, it transpires people using this enclosure with other docks (CalDigit TS4, mainly) were having the same issues. Talking to OWC's tech support over email (they responded quickly), I asked if their docks would enable the enclosure/drive to perform at USB 4 speeds. They said yes, so I bought the OWC 11-port Thunderbolt 4 dock and it worked. You won't get quite full performance when using a dock, but I am getting over 2GBps reads and writes (almost 3GBps reads) via the OWC dock and am happy with that. So if you are intending to use this drive with a dock, or wondering why it doesn't perform optimally with the one you're using, my recommendation is to (unfortunately) shell out for an OWC one.

## Features

- Ultra-reliable & Innovative: Patent pending heat-dissipating design offers rugged protection of your SSD while silently keeping drive cool for consistent top speed - Dont Risk your Data with Cheap Enclousres
- Flexible DIY Option: use your choice of NVMe M.2 2280, 2242, or 2230 SSD - Works with All Manufacturers SSDs up to 8.0TB capacity - as well as being ready for tomorrow’s 16TB and future capacities without limit.
- Ultra-fast: over 2x faster than Thunderbolt portable enclosures with up to 3836MB/s real-world performance
- Ultra-compatible: use with USB4, Thunderbolt, and USB-C computers and devices. Works with
- Portable: Bus-powered and palm-sized for convenient use anywhere - No power adapter required
- Complete Kit: includes 40Gb/s USB-C cable and screwdriver for enclosure
- Worry-free: 2 Year (enclosure) or 3 Year (Installed SSD Solution) OWC Limited Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CPYQPCVP |
| Best Sellers Rank | 8,135 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 25 in External Solid State Drives |
| Box Contents | OWC Express 1M2, 40Gb/s USB-C Cable, Screwdriver (Casing Only), Assembly Manual and User Manual |
| Brand | OWC |
| Brand Name | OWC |
| Cache Memory Installed Size | 40 |
| Color | Silver |
| Compatible Devices | Laptop, Desktop, Tablet, Smartphone |
| Compatible Video Game Console Models | Sony PlayStation 5 |
| Connectivity technology | Thunderbolt , USB |
| Country of Origin | Taiwan |
| Customer Package Type | PFF |
| Customer Reviews | 4.6 out of 5 stars 818 Reviews |
| Data Transfer Rate | 3151 Megabytes Per Second |
| EU Spare Part Availability Duration | 2 Years |
| Enclosure Material | Aluminium |
| Form Factor | M.2 |
| Global Trade Identification Number | 00810100983765 |
| Hard Disk Description | Solid State Drive |
| Hard Disk Form Factor | 2.5 Inches |
| Hard Disk Interface | Thunderbolt |
| Hard disk description | Solid State Drive |
| Hard disk form factor | 2.5 Inches |
| Hard disk interface | Thunderbolt |
| Hardware Connectivity | Solid State Drive, Thunderbolt, USB Type C |
| Hardware Platform | Mac, PC |
| Installation Type | External Hard Drive |
| Item Dimensions L x W x Thickness | 13L x 2.3W x 6.9Th centimetres |
| Item Weight | 280 Grams |
| Manufacturer | OWC |
| Manufacturer Part Number | OWCUS4EXP1MT04 |
| Media Speed | 3151 megabytes_per_second |
| Model Name | Express 1M2 |
| Model Number | OWCUS4EXP1M2 |
| Network Connectivity Technology | Thunderbolt, USB |
| Number of Items | 1 |
| Product Features | Heatsink, Portable |
| Product Warranty | 2 year manufacturer |
| Read Speed | 3151 Megabytes Per Second |
| Special feature | Heatsink, Portable |
| Specific Uses For Product | Business |
| UPC | 810100983765 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** OWC
- **Colour:** Silver
- **Compatible devices:** Laptop, Desktop, Tablet, Smartphone
- **Connectivity technology:** Thunderbolt, USB
- **Hard disk description:** Solid State Drive
- **Hard disk form factor:** 2.5 Inches
- **Hard disk interface:** Thunderbolt
- **Installation type:** External Hard Drive
- **Special feature:** Heatsink, Portable
- **Specific uses for product:** Business

## Images

![OWC Directly Managed USB4 (USB-C) 40Gbps Express 1M2 External SSD Case Only Maximum Effective Speed 3151MB/s Mac Windows Compatible - Image 1](https://m.media-amazon.com/images/I/71VCC4AJPYL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Incredible Speed and Performance!
*by D***K on 9 April 2025*

I recently purchased the OWC Express 1M2 NVMe Thunderbolt External Drive, and I am beyond impressed! This drive is a game-changer for anyone who needs fast, reliable external storage. The speed is mind-blowing — I'm consistently getting read and write speeds that far surpass anything I’ve experienced with other external drives. The Thunderbolt connectivity ensures lightning-fast data transfer, whether I'm editing large video files or working with heavy datasets. It's perfect for video editors, photographers, or anyone who needs high-performance storage for demanding tasks. The compact design is sleek and portable, making it easy to take with me on the go. I also appreciate the sturdy build quality, which gives me confidence that it's built to last. Setting it up was a breeze, and I had no issues with compatibility on my MacBook Pro and Mac Mini M4. It also stays cool even during extended use, with no noticeable slowdowns or overheating. Overall, this external drive is a fantastic investment. If you're looking for fast, reliable storage with excellent performance, I highly recommend the OWC Express 1M2!

### ⭐⭐⭐⭐⭐ Turn an NVME SSD into a high-performing external drive - UPDATE: note for dock users
*by J***N on 12 April 2026*

If you already have an NVME SSD to hand, this is a cheap(ish) way to turn it into a high performing Thunderbolt external drive. With a WD Black SN770 2TB SSD (pulled out of my desktop PC) inside and connected to my M4 MacBook Air, I can get over 3GBps read and write on this drive - probably difficult to get faster reads and writes than that with an external drive I'd reckon. Mounts fine every time and seems stable - doesn't disconnect when laptop goes to sleep. It was pretty easy to install the drive and it's even supplied with rubber feet for you to install over the screws once you've got the drive installed. The enclosure looks good and keeps the drive relatively cool - it gets warm, but never hot to the touch (even after hours of use). UPDATE: using with a Thunderbolt dock. I tried using this enclosure with several Wavlink Thunderbolt docks, and with each of them the drive only performed in USB 3.2 mode, achieving reads/writes of around 1GBps - much slower than if connected to the Mac directly. After some research, it transpires people using this enclosure with other docks (CalDigit TS4, mainly) were having the same issues. Talking to OWC's tech support over email (they responded quickly), I asked if their docks would enable the enclosure/drive to perform at USB 4 speeds. They said yes, so I bought the OWC 11-port Thunderbolt 4 dock and it worked. You won't get quite full performance when using a dock, but I am getting over 2GBps reads and writes (almost 3GBps reads) via the OWC dock and am happy with that. So if you are intending to use this drive with a dock, or wondering why it doesn't perform optimally with the one you're using, my recommendation is to (unfortunately) shell out for an OWC one.

### ⭐⭐⭐⭐⭐ Is there any better enclosure at these speeds?
*by M***L on 30 December 2025*

Not sure you can do better than this enclosure at this price. It’s fanless, so it’s entirely silent during operation and you don’t have to worry about the fan failing, which is huge double bonus. This should literally last as long as the components inside it do, with no other point of failure. Built with maximum efficiency so it stays at safe temps even during prolonged use. It’s rock solid, build like a brick, feels premium and high quality and has never gotten too hot to touch, only very warm when in use. It is a heat sink so it gets warm even when idle but that’s expected. It fell off my shelf (about 8 inch drop onto hardwood floor) with ssd installed and no affect on performance, not even a scuff! Every other enclosure I researched either had a fan (noise, point of failure) or had sketchy prolonged temps. This is the only one I found that does everything you could want an enclosure to do. It’s rare to find a product that has no discernible con or trade off, but this might just be it! Paired with a 990 Pro on MBP for gaming and works like a charm. It’s half the speed of the 990 Pro so will look at getting a faster enclosure in the future to unlock max SSD speeds. Until then this does everything it needs to.

## Frequently Bought Together

- OWC Express 1M2 Portable NVMe Thunderbolt (USB-C) SSD USB4 Ultra Fast External SSD Drive with Aluminum Heat Sink Enclosure (Enclosure Only)
- Samsung 990 PRO SSD 4TB PCIe 4.0 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-V9P4T0B/AM

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-05-25*