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Silver rectangular rugged portable SSD with finned aluminum heatsink and short USB4 cable

OWC

OWC US4V2EXP1MT04 4TB portable SSD

SKU CH-WWVB-CCSEZ MPN US4V2EXP1MT04

A 4 TB portable solid-state drive reaching 6362 MB/s over USB4 with a rugged aluminium heatsink for sustained performance

  • Total capacity4 TB
  • Interface typeUSB4
  • Form factorM.2 2280
  • Setup requirementsMac OS 14.x or higher, Windows 11 or higher
  • Operating temperature range41 °F - 95 °F
  • Storage temperature range-4 °F - 140 °F

Capacity 4TB

  • Real-world peak speed over 6000 MB/s for demanding workflows
  • USB4 interface delivers up to 6362 MB/s maximum read transfer rate
  • Rugged finned aluminum design dissipates heat silently for consistent performance
  • Bus-powered via included 12-inch USB4 cable with no external adapter needed
  • Works with Mac OS 14+, Windows 11+, iPad Pro, Chromebook and Surface devices

4 TB USB4 portable SSD

The OWC Express 1M2 80G delivers 4 TB of external storage in a bus-powered enclosure that connects through a single USB4 Type-C cable. It is aimed at creators and mobile professionals who need internal-drive speed while working away from a desk. The drive ships ready to run or can be purchased as a DIY kit for user-supplied M.2 modules.

USB4 interface limits

Peak real-world transfer reaches 6000 MB/s with a maximum read rate of 6362 MB/s, but sustained throughput depends on the host controller and cable quality. The drive requires Mac OS 14.x or higher or Windows 11 or higher to operate. Operating temperature range is 41 °F to 95 °F; storage range extends from -4 °F to 140 °F.

DIY upgrade and installation

A finned aluminium chassis acts as a heatsink, allowing tool-free access to the M.2 2280 or 2242 slot for future NVMe upgrades. The included 0.3 m (12") USB4 cable is short, so desk placement must be planned. Cross-platform Mac and PC use requires separate MacDrive software.

How it compares

Measured against everything we stock in Portable USB SSDs, at today’s prices. Recalculated every night.

Price $727.99
Pricier than about 90% of the 410 comparable items (median $202.99).
Total capacity 4 TB
Higher than about 90% of the 311 comparable items (median 1 TB).
Price per TB $182.00 per TB
Pricier than about 69% of the 310 comparable items (median $142.00 per TB).

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Specifications

Product
Brand nameOWC
Product lineExpress
Model name1M2 80G
Part numberUS4V2EXP1MT04
Total capacity4 TB
Product colorSilver
Ports & slots
Interface typeUSB4
Size & build
Form factorM.2 2280
Overall width2.8 in (7.11 cm)
Product depth5.2 in (13.2 cm)
Overall height0.9 in (2.29 cm)
Product weight9.9 oz
Shipping weight0.40 kg
Package size160 × 127 × 48 mm
In the box
Included itemsOWC Express 1M2 80G, 0.3M (12 in) USB4 cable, User Guide
Environment & compliance
Operating temperature range41 °F - 95 °F
Storage temperature range-4 °F - 140 °F

Other versions of this model

4 more in the same range

Questions about this item

Should I choose the DIY kit or the ready-to-run 4 TB version?

The DIY option lets you install your own M.2 2280 or 2242 NVMe SSD, while the ready-to-run unit ships with the 4 TB drive already fitted. Both use the same aluminium heatsink enclosure and included 12" USB4 cable.

What does the 6362 MB/s headline figure mean for everyday transfers?

It is the maximum read transfer rate under ideal conditions; real-world peak speeds exceed 6000 MB/s, so large video files and project folders move at near-internal-drive pace when the host supports USB4.

Which USB standard does the drive use and what speed does it cap at?

The drive uses USB4 via the supplied Type-C cable, delivering up to 6362 MB/s maximum read transfer rate on compatible Macs, PCs, iPad Pros, Chromebooks and Surface devices.

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