OWC
4TB Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt Compatible/USB-C) Ultra Fast External SSD Drive with Aluminum Heat Sink Enclosure
*Price sourced from Amazon.com. Last updated 2026-05-21. Price and availability subject to change.
SpecPicks Verdict
SpecPicks classifies OWC 4TB Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt… as a category leader on buyer feedback in the external storage category, based on 945 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. OWC's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 4.7★ average across customer reviews
- ✓ Ultra-compatible: use with USB4, Thunderbolt, and USB-C computers and devices
- ✓ Backed by OWC's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- 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
- Ultra-reliable & Innovative: Patent pending heat-dissipating design offers rugged protection of your SSD while silently keeping drive cool for consistent top speed
- Flexible DIY: use your choice of NVMe M.2 2280, 2242, or 2230 SSD
- Portable: bus-powered and palm-sized for convenient use anywhere
- Complete: includes 40Gb/s USB-C cable and screwdriver for enclosure
Full Specifications
| Brand | OWC |
|---|---|
| Color | Silver |
| Complete | includes 40Gb/s USB-C cable and screwdriver for enclosure |
| Portable | bus-powered and palm-sized for convenient use anywhere |
| Model Name | Express 1M2 |
| Read Speed | 3151 Megabytes Per Second |
| Ultra-fast | over 2x faster than Thunderbolt portable enclosures with up to 3836MB/s real-world performance |
| Unit Count | 1.0 Count |
| Worry-free | 2 Year (enclosure) or 3 Year (solution) OWC Limited Warranty |
| Form Factor | portable |
| Media Speed | 3151 Megabytes Per Second |
| Connectivity | USB-C |
| Flexible DIY | use your choice of NVMe M.2 2280, 2242, or 2230 SSD |
| Model Number | OWCUS4EXP1MT01 |
Ready to buy?
OWC 4TB Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt Compatible/USB-C) Ultra Fast External SSD Drive with Aluminum Heat Sink Enclosure is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-21. Price and availability subject to change.
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