OWC Express 4M2 Ultra – 16TB (SoftRAID License Included) is a pre-configured four-slot Thunderbolt 5 NVMe RAID array built for professional editing and high-bandwidth workflows.
It delivers up to 6622MB/s over Thunderbolt 5 and ships with NVMe SSDs installed and SoftRAID Premium included for 3 Years.
The second Thunderbolt 5 port supports daisy chaining up to five additional Thunderbolt devices plus one USB peripheral.
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OWC Express 4M2 Ultra – 16TB (SoftRAID License Included) is a four-slot Thunderbolt 5 NVMe RAID solution delivered pre-configured so creative teams can connect and start working immediately.
The enclosure combines all-flash NVMe capacity with SoftRAID-managed redundancy and Thunderbolt 5 bandwidth to accelerate demanding workflows.
Experience up to 6622MB/s real-world speed over Thunderbolt 5 (80Gb/s). Over Thunderbolt 4 or USB4 (40Gb/s) the array can reach up to 3200MB/s, and on Thunderbolt 3 systems it can reach up to 2800MB/s.
This SKU ships configured with 16TB of NVMe storage and the enclosure supports up to 32TB in a single unit. Capacity can be expanded up to 128TB as one unified volume by daisy chaining additional Express 4M2 Ultra units.
Four NVMe M.2 slots accept 2242 and 2280 single- or double-sided PCIe 3.0/4.0/5.0 SSDs. RAID 0/1/4/5/10 (1+0)/JBOD configurations are supported via SoftRAID or alternative RAID utilities.
The unit provides two Thunderbolt 5 (80Gb/s) ports and ships with a Thunderbolt 5 80Gb/s cable. The second Thunderbolt 5 port allows daisy chaining of up to five additional Thunderbolt devices plus one USB peripheral.
The solid aircraft-grade aluminium body offers passive thermal protection and a smart adaptive fan that quietly activates only during sustained workloads to avoid thermal throttling and unnecessary noise.
The product includes 3 Years of SoftRAID Premium for advanced RAID monitoring and predictive health alerts, and it ships with 2 Strada licenses for 90 days to enable remote team access and collaboration without cloud uploads.
Compatible with Thunderbolt 5, Thunderbolt 4, USB4 Macs and PCs, and Thunderbolt 3 Macs.
The unit is backed by a 2 Year OWC Limited Warranty and OWC’s manufacturing and testing processes; NVMe SSDs are installed, tested, and RAID-configured with SoftRAID before shipping.
| Configured Capacity | 16TB |
| Maximum Single-Enclosure Capacity | 32TB |
| Expandable Capacity (Daisy Chaining) | Up to 128TB as one volume |
| Drive Bays | Four NVMe M.2 slots |
| Supported Drive Form Factors | NVMe M.2 2242 and 2280, single or double-sided |
| Supported PCIe Generations | PCIe 3.0 / PCIe 4.0 / PCIe 5.0 SSDs |
| Preconfiguration | NVMe SSDs installed, tested, and RAID-configured with SoftRAID before shipping |
| RAID Levels Supported | RAID 0 / 1 / 4 / 5 / 10 (1+0) / JBOD |
| Host Connectivity | Two Thunderbolt 5 (80Gb/s) ports |
| Daisy Chain | Up to five additional Thunderbolt devices plus one USB peripheral via the second Thunderbolt 5 port |
| Included Cable | Thunderbolt 5 80Gb/s cable |
| Real-World Speed (Thunderbolt 5) | Up to 6622MB/s |
| Real-World Speed (Thunderbolt 4 / USB4 40Gb/s) | Up to 3200MB/s |
| Real-World Speed (Thunderbolt 3) | Up to 2800MB/s |
| PCIe Generation Performance Notes | Up to 6622MB/s achieved with PCIe 4.0 and later SSDs. PCIe 3.0 SSDs are limited up to 3800MB/s. |
| Cooling / Chassis | Solid aircraft-grade aluminium body with smart adaptive fan that activates only during sustained workloads |
| Compatibility | Use with Thunderbolt 5, Thunderbolt 4, USB4 Macs and PCs, and Thunderbolt 3 Macs |
| SoftRAID Included | SoftRAID Premium included: 3 Years |
| Strada Licenses Included | 2 Strada licenses for 90 days |
| Unit Warranty | 2 Year OWC Limited Warranty |
| Box Contents | Express 4M2 Ultra (configured with NVMe SSDs), Thunderbolt 5 80Gb/s cable, 3 Years of SoftRAID Premium, 2 Strada licenses for 90 days |
Generally, next working day delivery services (UK Mainland) are available on standard OWC Delivery orders placed before 2 pm (subject to stock availability).
Non-timed deliveries should be delivered between 9 am and 6 pm.
Orders placed after 2 pm on Fridays and weekends will be processed as normal the following Monday.
Orders placed on Bank Holidays will be processed the next working day.
If urgent, please call one of our helpful account managers so they may double check everything for you, enabling you to place your order with confidence.
Please note: these product details are for guide purposes only, and may contain errors.
We always recommend double-checking the product specs and features on the the manufacturer website, or contact us if unsure before ordering.
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