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Storage

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Introducing the New OWC Express 4M2: The Ultimate DIY 4-Slot NVMe RAID Enclosure

Meet the new and improved OWC Express 4M2: a DIY-friendly, 4-slot USB4 NVMe enclosure. Achieve 3200MB/s speeds, customize storage with flexible RAID 0/1/4/5/1+0, and expand capacity with OWC Aura SSDs up to 8TB and beyond.

Wayne Grayson • Jul 03, 2025

Hot on the heels of the unique OWC Guardian secure portable SSD, we're thrilled to announce another member of the OWC storage family: the new-and-improved OWC Express 4M2. The Express 4M2 is our newest four-slot NVMe M.2 SSD USB4 enclosure, designed to meet the rigorous demands of creative and business professionals.

The previous generation Express 4M2 was a huge hit with our customers. When it came time to introduce a successor, customers told us they wanted the same performance in a quieter, more adaptable solution.

This new iteration does exactly that, building upon the success of its predecessor by incorporating enhanced features like USB4 compatibility, faster speeds, improved thermal management, and expanded RAID options, all while maintaining a near-silent operation.

Whether you're backing up critical footage on set, editing intricate 8K video, or sifting through vast libraries of high-resolution photos, the Express 4M2 is engineered to keep pace with your most demanding tasks.

Blazing Fast Performance

The OWC Express 4M2 is a true powerhouse when it comes to speed, delivering real-world performance of up to 3200MB/s. This incredible speed ensures that even the most data-intensive operations, such as multi-camera offloads and large batch processing, are handled with efficiency.

The enclosure's aircraft-grade aluminum shell not only provides rugged protection for your installed SSDs but also effectively dissipates heat, ensuring consistent top speeds and preventing slowdowns due to overheating. Aiding in this drive's effective thermal management are a set of smart, adaptive fans that activate only when needed or under heavy load.

The Express 4M2 is also highly compatible, fitting seamlessly into any workflow with full support for USB4, Thunderbolt, and USB-C Macs and PCs.

Massive Storage Capacity

The Express 4M2 supports up to four NVMe M.2 2230, 2242, or 2280 SSDs. This includes OWC Aura SSDs, with each drive supporting up to a massive 8TB capacity. This means you can populate the four slots for truly expansive storage.

Even better, when tomorrow’s 16TB and larger drives hit the scene, you can easily boost your Express 4M2’s capacity, ensuring your investment is future-proof.

DIY Friendly

We understand the importance of user-friendliness, and the OWC Express 4M2 delivers on that front. This enclosure is designed for DIY ease, accommodating up to four NVMe M.2 2230, 2242, or 2280 SSDs. This flexibility allows you to choose the drives that best suit your needs and easily install them yourself.

Robust RAID Capabilities

The OWC Express 4M2 offers flexible RAID options, allowing you to create the perfect setup for your workflow, whether you prioritize maximum performance, data redundancy, or a combination of both. It supports RAID levels 0, 1, 4, 5, and 1+0 (10).

You can also order the Express 4M2 with OWC SoftRAID, our incredibly fast and flexible RAID tool. For those who prefer other options, the Express 4M2 also supports Apple Disk Utility RAID, Windows Disk Management RAID, and Windows Storage Spaces.

A Pro User's Essential Tool

The OWC Express 4M2 is an invaluable tool for a wide range of professional applications. Its blazing speed and robust storage capabilities make it ideal for:

  • Video Production: From on-set media backup to 8K video editing and color grading, the Express 4M2 can handle massive video files with ease, preventing slowdowns during critical production phases. Express 4M2 provides an affordable yet high-performance NVMe SSD RAID with the ability to deliver maximum offload speeds and thermal stability when backing up media cards from multiple cameras on set.
  • Photography: Professionals dealing with thousands of high-resolution photos, whether for cataloging, editing, or archiving, will benefit from the rapid transfer and processing speeds.
  • Audio Production: Large sample libraries, multi-track recording, and intricate sound design projects demand fast and reliable storage, which the 4M2 readily provides.
  • Scientific and Research Data: Handling and analyzing large datasets requires dependable, high-speed storage, making the Express 4M2 a valuable asset for research professionals.

The OWC Express 4M2 provides unparalleled value for professionals seeking to maximize performance, enhance reliability, and streamline their workflows without compromise.

Pre-Order Express 4M2 Today

The OWC Express 4M2 is available now for pre-order, starting at $239.99 for the 0GB model, with a 0GB model including a 3-year SoftRAID license available for $379.99. It should start shipping in August.

Learn more and pre-order your OWC Express 4M2 today at this link.

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