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Your Drives. Your RAID. Powered by Thunderbolt 5.
You asked for it. We delivered. Express 4M2 Ultra combines everything creative professionals like you dreamed about: the freedom to choose any NVMe M.2 drive, the flexibility to configure your storage exactly how you need it, and the dramatically improved efficiency of your workflow with Thunderbolt 5 bandwidth. Now you can build a desktop powerhouse RAID with your choice of drives and experience up to 6622MB/s performance that turns massive 12K RAW video files, 8K multi-cam sequences, and monster photo libraries into effortless workflows. From backing up media cards on set to working through intense VFX compositing in post, Express 4M2 Ultra delivers the customization and speed you need to stay ahead of deadlines.
Build Your Perfect Storage Solution
Engineered to support any NVMe M.2 2280 or 2242 SSD, this compact powerhouse gives you total freedom to choose your preferred brand, capacity and performance level, whether it’s bleeding-edge fast PCIe 5.0/4.0 drives or mid-level speed PCIe 3.0 drives you may already own.1 Add up to a massive 8.0TB capacity per drive for 32TB total. When tomorrow's 16TB drives hit the market, you can easily boost your Express 4M2 Ultra's capacity without buying a new enclosure. Your storage. Your choice. Your future.
Expands With Your Growing Needs
Start with up to 32TB in a single compact enclosure. When you need more capacity, daisy-chain additional Express 4M2 Ultra units through the second Thunderbolt 5 port to create one huge, unified volume instead of juggling multiple drive letters or splitting projects across locations. Four enclosures give you 128TB and beyond. The second Thunderbolt 5 port also lets you connect up to five additional Thunderbolt devices plus one USB peripheral. Your workspace grows exactly how you need it. Production companies building shared storage arrays and solo creators future-proofing their setup get the same limitless scalability.
Unleash Maximum Speed with Thunderbolt 5
Express 4M2 Ultra is the fastest DIY multiple NVMe SSD enclosure we offer and was purposefully built to harness Thunderbolt 5's incredible 80Gb/s bandwidth. Experience up to 6622MB/s performance with your Mac or PC. Connect to Thunderbolt 4 or USB4 systems and still get speeds up to 3200MB/s. Even Thunderbolt 3 Macs tap into blazing performance. You're never locked out, and you're always ready for your next system upgrade.
| Runs as | Real-World Speed Up to |
|---|---|
|
Thunderbolt 5 (80Gb/s) |
6622MB/s |
|
Thunderbolt 4 (40Gb/s) |
3200MB/s |
|
Thunderbolt 5 (80Gb/s) |
6622MB/s |
|
USB4 (40Gb/s) |
3200MB/s |
|
Thunderbolt 3 (40Gb/s) |
2800MB/s |
Express 4M2 Ultra is ideal for:
DITs and Filmmakers wanting to build the fastest compact NVMe SSD RAID with expandable capacity and the ability to daisy-chain additional enclosures as a massive single volume or connect devices for additional capabilities through the second Thunderbolt 5 port while experiencing maximum offload speeds and thermal stability when backing up media cards from multiple cameras on set.
Professional video editors, VFX artists, Colorists, and high-volume photographers seeking the fastest NVMe SSD RAID to handle demanding post-production and editing workflows including 12K RAW video, VFX compositing work, multicam sequences in 8K RAW or ProRes video, and batch editing ultra-high-resolution pictures.
Performance-driven professionals, power users, and technical teams who require full control over capacity, speed, and scalability. Express 4M2 Ultra is the ultimate DIY Thunderbolt 5 NVMe RAID platform for pushing demanding workflows and data intensive applications beyond conventional limits.
Talkin' 'Bout Your Generation
More than just great song lyrics, you need to consider which PCIe SSD generation is appropriate for your unique needs. Check out the speeds you can experience when using different generation SSDs in Express 4M2 Ultra:
| Single Drive or JBOD | RAID 0 |
|---|---|
|
up to 1600MB/s |
up to 6622MB/s |
|
up to 1600MB/s |
up to 6622MB/s |
|
up to 950MB/s |
up to 3800MB/s |
The Most Powerful RAID Tool on the Planet.
SoftRAID is the world’s fastest and most flexible application to configure, maintain, and protect your RAID volumes on Mac and PC.
- High-Performance RAID 0/1/4/5/1+0 (10) volumes
- Predictive Health Monitoring proactively notifies of Volume and Disk issues well before failure — provided on your computer and remotely
- Seamless Cross-Platform Sharing with support for Apple-formatted APFS and HFS+ SoftRAID volumes between Mac and Windows at no additional cost
- 35+ Years of Experience of Pro Support to provide peace-of-mind with setup help, ongoing questions, or urgent disk issues
- And many more unique features.
- Learn more about SoftRAID
Select OWC solutions and enclosures include 3 Years of SoftRAID Premium! See includes section for details.
Your Data’s Reliability is Our #1 Priority
Anyone can put a bunch of components in a housing and call it an enclosure or a drive. OWC is not just anyone. We’re a group of filmmakers, musicians, designers, content creators, and parents just like you wanting to capture and preserve that irreplaceable moment. Our data storage products go through countless hours of ongoing development testing and certification processes. We then subject them to extreme real-world abuses. The priority for some storage devices is to be a mass-produced, lowest price commodity. We do it differently because the reliability of your data and the longevity of an OWC product is priority #1.
Discover the OWC Difference
Since 1988, our mission has focused on maximizing the usefulness and longevity of your technology investment. Our business operations share that same sustainability commitment. As the first 100% on-site wind powered technology manufacturer/distributor in the U.S., we now generate excess power. 97% of solid waste is recycled. These and other actions have resulted in our headquarters being Energy Star® and LEED® Platinum certified. Learn more about our passion for the planet we share here: Environmental Sustainability
- Up to 6622MB/s achieved with PCIe 4.0 and later SSDs. PCIe 3.0 SSDs are limited up to 3800MB/s.