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OWC Express 4M2 4-Slot SSD Enclosure

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  • 4 x M.2 Slots
  • Thunderbolt 3 | DisplayPort
  • Supports 4K Resolution
  • Includes SoftRAID XT
  • Includes Thunderbolt 3 Cable
  • Includes Power Supply & Cable
  • Windows & Mac Compatible

The OWC Express 4M2 4-Slot SSD Enclosure uses four M.2 slots to hold separately housed solid state drives. The OWC Express 4-Slot M.2 NVMe SSD Enclosure will safely house your personal digital data with its durable aluminum body. The Express 4-Slot SSD Enclosure provides two Thunderbolt 3 ports for device connectivity and a DisplayPort that can be used to extend your display screen. With the OWC Express 4-Slot M.2 SSD Enclosure you'll receive SoftRAID XT, a Thunderbolt 3 cable, a power supply, and charging cable. This device supports a total storage capacity of 32TB and is compatible with both Windows and MacOS software. All drives are available separately.


Non-Volatile Memory Express provides an efficient communication interface protocol, so you can utilize SSD technology and high-performance connection buses like PCIe. Furthermore, there is room for four NVMe SSDs while also supporting multiple enclosures, advanced drive monitoring, e-notifications, and downloadable updates.

SoftRAID Compatible

The OWC Express 4M2 features a SoftRAID engine for sturdy performance. Moreover, SoftRAID protects your data by alerting you to issues before anything happens, ensuring you're protected. Advanced monitoring tools work behind the scenes to keep your RAID running in tip-top shape.

RAID and Storage Spaces

The OWC Express 4M2 comes with SoftRAID XT ready to be set up in RAID 0 performance or RAID 1 mirrored drive mode, so you can customize this enclosure for speed or data redundancy. If you need more options, you can upgrade to add capabilities and RAID modes.


Extend your screen with a DisplayPort output located on the rear of the OWC Express 4M2.

Thunderbolt 3

The OWC Express 4M2 is compatible with Thunderbolt 3 and comes with an OWC Thunderbolt 3 cable, which is Thunderbolt certified for Mac and Windows. Moreover, the OWC Express 4M2 is backward compatible with Thunderbolt and Thunderbolt 2.


The OWC Express 4M2 comes equipped with an OWC SoftRAID, which provides RAID compatibility across multiple drive enclosures. Furthermore, add Express 4M2 drives to your storage pool using Windows Storage Spaces. Configure and reconfigure your storage however you need by combining multiple OWC Express 4M2 drives together on Mac and Windows systems.

Windows Compatible

The OWC Express 4M2 fully supports Windows workflows using Windows Storage Spaces. Pool the four M.2 NVMe SSDs together with support for all the storage spaces with configuration options, including the ability to add another OWC Express 4M2 to expand your storage pool on the fly.

Compact Design

This enclosure is design to be small and portable.


iMac Pro 27" (Late 2017)
Model ID: iMacPro1, 1
2.3 GHz, 2.5 GHz, 3.0 GHz, 3.2 GHz
iMac with Retina 5K Display 27" (Mid 2017)
Model ID: iMac18, 3
3.4 GHz, 3.5 GHz, 3.8 GHz, 4.2 GHz
iMac with Retina 4K Display 21.5" (Mid 2017)
Model ID:iMac18, 2
3.0 GHz, 3.4 GHz, 3.6 GHz
iMac 21.5" (Mid 2017)
Model ID: iMac18, 1
2.3 GHz
MacBook Pro with Touch 15" (Mid 2018)
Model ID: MacBookPro15, 1
2.2 GHz, 2.6 GHz, 2.9 GHz
MacBook Pro with Touch 13" (Mid 2018)
Model ID: MacBookPro15, 2
2.3 GHz, 2.7 GHz
MacBook Pro with Touch 15" (Mid 2017)
Model ID: MacBookPro14, 3
2.8 GHz, 2.9 GHz, 3.1 GHz
MacBook Pro with Touch 13" (Mid 2017)
Model ID: MacBookPro14, 2
3.1 GHz, 3.3 GHz, 3.5 GHz
MacBook Pro with Retina Display 13" (Mid 2017)
Model ID: MacBookPro14, 1
2.3 GHz, 2.5 GHz
MacBook Pro with Touch 15" (Late 2016)
Model ID: MacBookPro13, 3
2.6 GHz, 2.7 GHz, 2.9 GHz
MacBook Pro with Touch 13" (Late 2016)
Model ID: MacBookPro13, 2
2.9 GHz, 3.1 GHz, 3.3 GHz
MacBook Pro with Retina Display 13" (Late 2016)
Model ID: MacBookPro13, 1
2.0 GHz, 2.4 GHz
In the Box
  • OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure
  • SoftRAID XT
  • Power Supply and Cable
  • Thunderbolt 3 Cable
  • Limited 1-Year Warranty
More Information
Product ConditonNew

OWC Express 4M2 Specs


Number of Bays 4 x M.2 (2280)
I/O 2 x USB Type-C (Thunderbolt 3 (40 Gb/s))
1 x DisplayPort
Transfer Rates 2800 MB/s


OS Compatibility macOS 10.12 or Later
Windows 10 or Later
*As of October, 2018: Check with manufacturer for the most up-to-date compatibility


Encryption None
Security Features Kensington Security Slot


AC Input Power 100 to 240 VAC, 50 / 60 Hz
DC Input Power 12 VDC at 7.5 A
Power Source AC Adapter


Operating Temperature 32 to 104°F / 0 to 40°C
Storage Temperature -4 to 158°F / -20 to 70°C
Certifications CE, FCC
*as per Manufacturer


Cooling 1 x Fan
Material of Construction Aluminum
Dimensions 5.35 x 4.45 x 2.36" / 13.6 x 11.3 x 6 cm
Weight 1.8 lb / 800.0 g
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov
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