OWC
Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt Compatible/USB-C) Ultra Fast External SSD Drive with Aluminum Heat Sink Enclosure (Enclosure Only)
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
Bottom line: The Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt Compatible/USB-C) Ultra Fast External SSD Drive with Aluminum Heat Sink Enclosure (Enclosure Only) is a niche pick — read recent reviews before buying in the external storage category, priced around $78.99. Read recent reviews carefully before committing.
SpecPicks Verdict
SpecPicks classifies OWC Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt… as a niche pick — read recent reviews before buying in the external storage category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. OWC's positioning sits within the broader category mid-tier. 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
- ✓ 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 | OWCUS4EXP1M2 |
Ready to buy?
OWC Express 1M2 40Gb/s Portable NVMe SSD USB4 (Thunderbolt Compatible/USB-C) Ultra Fast External SSD Drive with Aluminum Heat Sink Enclosure (Enclosure Only) 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 2026-07-22. Price and availability subject to change.
Related External Storage
![WD_BLACK 250GB SN770 NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 4,000 MB/s - WDS250G3X0E - [Previous Generation]](https://m.media-amazon.com/images/I/310UZVOtlfL._SL500_.jpg)
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best Retro Handhelds in 2026 — From $35 to $500
- How to Build a Windows 98 Retro PC in 2026
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Best 1440p Gaming GPUs in 2026
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
More reviews from the SpecPicks archive
Browse all reviews →- GeForce 4 Ti 4600 Won't Boot in Windows XP — Field Troubleshooting Guide
- JADEPUFFER Agentic Ransomware: Why a Local AI Rig Changes Your Threat Model
- ComfyUI on an RTX 3060 12GB: Stable Diffusion Setup and Real tok-per-image Math
- Jetson Orin Nano Super vs Raspberry Pi 5: Real Edge-AI Benchmarks (2026)
- Best Gaming Mouse Pad for Esports & Office Use in 2026
- LM Studio vs Ollama on an RTX 3060 12GB: Which Local Runtime in 2026?
- Simba 3.2 Tops the TTS Leaderboard: Run Local Text-to-Speech on an RTX 3060 12GB
- Best Webcam for Twitch Streaming Under $100 in 2026
- AI-Driven Vintage Driver Install on WinXP: Using Vision-LLM to Walk a Voodoo + Audigy Setup
- Apple Intelligence Gets a Second Shot With Google and Nvidia Help
- Raspberry Pi 5 8GB Review (2026): Still the SBC to Beat
- Kimi K2.7 Code: 12x Cheaper Than GPT-5.5, But Can You Run It Locally?
- Anthropic: AI Builds Working Exploits in Hours, Not Weeks
- Period-Correct 1999 LAN Rig: Pentium III, Voodoo3 3000, Sound Blaster
- Noctua-Style Raspberry Pi 5 NAS Build Goes Viral — What Pi 4 Owners Can Borrow
- LoRA Fine-Tuning Small LLMs on an RTX 3060 12GB in 2026
- Best Budget Gaming Mouse Pad for Esports in 2026
- Kimi K2.7 Code Is 12x Cheaper Than GPT-5.5 — Run It Local?
- Best Wireless Productivity Keyboards Under $50 in 2026
- Ryzen 7 5800X vs 5700X for a Dual-Duty Gaming and Local-LLM Build
- MiniCPM5-1B: The 1B Model That Beats Reasoning Peers by Knowing When to Shut Up
- Best 4K Monitor for the PS4 Pro and PS5 in 2026 (Value Pick)
- Ollama vs LM Studio vs llama.cpp on an RTX 3060 12GB: Best Local Runner in 2026
- Best Gaming PC Build Components for 2026