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OWC Express 4M2 USB4 3.2 SSD Enclosure, M.2 to USB-C

 

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OWC
Part no OWCUS4EXP4M2S
Ascent part no 799768
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The OWC Express 4M2 USB4 Enclosure with SoftRAID (Model OWCUS4EXP4M2S) is a high-performance, external RAID-ready enclosure designed for creative professionals demanding exceptional storage speed and flexibility. Supporting up to four M.2 NVMe SSDs with a plug-and-play USB4 interface, this enclosure enables lightning-fast data transfers (up to 2800 MB/s) and reliable RAID configurations via the included SoftRAID software. With a rugged, compact design ideal for desktop or portable workstation use, the Express 4M2 is suited to tasks like 4K/8K video editing, large-scale file backup, and intensive project workflows on Mac, Windows, or Linux systems.

Technical Specifications

Product NameOWC Express 4M2 USB4 Enclosure with SoftRAID
ManufacturerOWC
Model NumberOWCUS4EXP4M2S
Product LineExpress 4M2
Product CategoryDrive enclosures
PHYSICAL
Product typeDrive Enclosure
Product lineExpress 4M2
ColourBlack
Form factorExternal, Portable
Dimensions24.5 cm x 10.6 cm x 4.8 cm (9.65'' x 4.17'' x 1.89'')
Weight970g (2.13 lbs)
STORAGE & DRIVE SUPPORT
Drive bays4
Drive interfaceM.2 NVMe (PCIe 3.0/4.0 x4) SSD
Drive sizeM.2 2280
Drive type supportedM.2 NVMe SSD (2242, 2260, 2280 lengths supported; SATA M.2 drives not compatible)
CONNECTIVITY
External connectionUSB4 (compatible with Thunderbolt 4/3, USB 3.2/3.1 Type-C)
Host interfaceUSB-C
Max data transfer rateUp to 2800 MB/s (with USB4/Thunderbolt 4 host)
Bus-poweredYes, with optional external power supply for high-power configurations
Backward compatibilityYes, with USB 3.2, Thunderbolt 3 & 4
RAID/SOFTWARE
SoftRAID includedYes (macOS and Windows compatible)
RAID levels supported0, 1, 4, 5, 10, JBOD, and single-disk
Operating systems supportedmacOS 10.14.6 or later, Windows 10/11, some Linux support
COOLING
CoolingSilent fan with advanced thermal design
SECURITY
Kensington Lock SlotYes
Warranty Information3-year limited OWC warranty
Overall SentimentGenerally positive. The OWC Express 4M2 USB4 Enclosure receives praise for excellent speed, flexible RAID, and build quality, though some mention fan noise as a minor negative.

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Please read our terms and conditions. We try very hard to make sure the specification and images on this page are accurate, but occasionally (and thankfully rarely) mistakes do happen. If you discover the product delivered is not as described, please let us know as soon as possible after delivery so we can correct the mistake and arrange for the product to be returned.

OWC
Part no OWCUS4EXP4M2S
Ascent part no 799768
  • Free NZ deliveryNo hidden fees
  • 100% Kiwi owned34 years in business
  • Net Promoter Score 94Rated by our customers
Questions? (04) 802 3890


"Was the lowest cost inc shipping, did not charge credit card surcharge fees, and I have used before without issues." Jay, 22 September 2026
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