OWC Unveils Express 4M2 Ultra: The First Certified Thunderbolt 5 Four-Slot NVMe SSD Enclosure

Other World Computing (OWC), a recognized leader in high-performance storage and connectivity solutions, has announced the launch of the OWC Express 4M2 Ultra at NAB 2026. This innovative enclosure is the first certified Thunderbolt 5 four-slot NVMe M.2 SSD enclosure, designed to meet the demanding needs of creative and business professionals seeking top-tier speed, reliability, and flexibility in a compact form factor.

Unmatched Performance and Flexibility for Professionals

The OWC Express 4M2 Ultra is engineered for users who require the fastest DIY RAID performance without compromising on size or build quality. Supporting up to four user-selected NVMe M.2 SSDs, the enclosure allows configuration in RAID 0, 1, 4, 5, or 10, as well as JBOD, delivering real-world speeds of up to 6622 MB/s. This makes it an ideal solution for intensive workflows such as 8K+ video editing, high-resolution content creation, and data-intensive business applications.

Advanced Design and Thermal Management

Constructed from solid aircraft-grade aluminium, the Express 4M2 Ultra offers both durability and effective heat dissipation. Its smart adaptive fan ensures quiet and efficient thermal management, keeping drives cool even during sustained high-speed transfers. This thoughtful design helps maintain optimal performance while minimizing noise, allowing professionals to stay focused on their work.

Expandability and Connectivity

The enclosure features a second Thunderbolt 5 port, enabling users to daisy chain up to five additional Thunderbolt devices, including more Express 4M2 Ultra enclosures. This allows for the creation of a single, massive storage volume without sacrificing speed or reliability. The Express 4M2 Ultra is compatible with Thunderbolt 5, Thunderbolt 4, Thunderbolt 3 (Mac only), and USB4 systems, ensuring broad compatibility across modern Mac and PC platforms.

Key Features of the OWC Express 4M2 Ultra

  • Up to 6622 MB/s Real-World Performance: Achieve ultra-fast data transfers and seamless 8K+ video workflows with Thunderbolt 5 connectivity.
  • DIY Flexibility: Install your choice of four M.2 2280 or 2242 NVMe SSDs for a customized storage solution.
  • Comprehensive RAID Support: Easily configure RAID 0, 1, 4, 5, 10, or JBOD using OWC’s SoftRAID or your preferred RAID utility.
  • Massive Storage in a Compact Design: Accommodate up to 32TB of storage while minimizing desk space.
  • Expandable Capacity: Connect additional Express 4M2 Ultra enclosures to create a single, high-capacity storage volume.
  • Versatile Connectivity: Second Thunderbolt port supports daisy chaining of up to five Thunderbolt devices and one USB peripheral.
  • Smart Thermal Management: Aircraft-grade aluminium housing and adaptive fan keep drives cool and quiet.
  • Wide Compatibility: Works seamlessly with Thunderbolt 5, 4, and USB4 Macs and PCs, as well as Thunderbolt 3 Macs.

Availability and Pricing

The OWC Express 4M2 Ultra is available for pre-order, starting at $399.99 for the standard model and $549.99 for the version bundled with SoftRAID. Shipments are expected to begin in the third quarter of 2026.