4-Slot NVMe M.2 SSD Enclosure with SoftRAID
Mac / PC / Thunderbolt 3
Infinitely configurable. Infinitely reconfigurable.
You like to explore your own independent path, and digital storage is where you have fun, push hard and spark the imagination. You explore, you refine, and when ready, you share your vision with the world. The OWC Express 4M2 is the external drive built for the journey before you and the path yet to be explored.
Customize your Express 4M2 with up to four NVMe SSDs, RAID them however you wish and connect it all with Thunderbolt 3 — the fastest and most flexible interface around. The sheer performance of the Express 4M2 helps you meet deadlines faster, giving you more time to explore your creativity and push your projects further.
Small in stature. Big on capability. The OWC Express 4M2 is ready to serve with four easy-to-access NVMe M.2 SSD slots customizable for any workflow with vibration damping feet that allow for vertical or horizontal orientation. Install up to 32TB of capacity and experience up to 2800MB/s of mind-bending performance via Thunderbolt 3. The Express 4M2 is an amazingly small digital workhorse with world-renowned OWC quality and award-winning support built in.
Ingest and duplicate dailies at breakneck speeds, work with higher resolutions, smoothly scrub through demanding timelines, and plow through thousands of photos with ease. The OWC Express 4M2 is one seriously fast drive to have by your side to take your digital capabilities to a new level.
- Four NVMe M.2 SSD bays
- Up to 2800MB/s
- Compact design
- Includes SoftRAID: robust software for creating, monitoring, and managing advanced RAID sets
- Thunderbolt Certified for Mac and Windows
- Thunderbolt 3 cable
Built Smaller and Faster from Input by Pros Like You
The OWC Express 4M2 is designed with superior ease-of-use in mind. We worked with award-winning creatives and listened to the kudos they heaped onto the OWC ThunderBay mini, and we put all that shared knowledge to good use when we set out to build the next-gen Thunderbolt 3 multi-bay drive. The result is the 57% smaller and 2.5x faster OWC Express 4M2.
It's smaller and easier to fit into your workflow, studio and on stage. It's faster with four easy-access M.2 slots so you can swap, upgrade or expand your Express 4M2 to configure and reconfigure it to serve any project need.
Game-Changing NVMe SSD Performance
NVMe (Non-Volatile Memory Express) is a hyper-efficient communications interface protocol built from the ground up to properly take advantage of SSD technology and high-performance connection buses like PCIe. The result is exponentially faster and efficient SSD storage, and the OWC Express 4M2 has room for four NVMe SSDs.
Display connection flexibility is yours with a convenient DisplayPort located right on the rear of the OWC Express 4M2. There's no need to worry about adapters or extra long cables. Just plug your display directly into the Express 4M2 and you're all set.
The OWC Express 4M2 comes equipped with OWC SoftRAID which provides the amazing capability to RAID across multiple drive enclosures. You can also add more 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.
Includes SoftRAID XT: Easy and Complete Drive Management
SoftRAID XT is the most powerful, intuitive software RAID utility on the market. Multiple RAID options let you select the RAID level that fits you or your project’s needs best. If you need maximum volume capacity, optimum drive performance, data protection, or a combination of attributes, SoftRAID has you covered.
Packed with features like drive validation, verification and failure prediction—SoftRAID includes features you simply don’t get with hardware RAID. It’s like having a datacenter on your desktop! From home users looking to protect photos and documents to professionals needing to protect and quickly access projects, SoftRAID is the perfect solution.
- Compatible: Works with macOS 11 Big Sur, M1 Macs and Windows 10
- Advanced: Create RAID 0/1/4/5/1+0 (10) with Macs, RAID 0/1 with Windows machines
- Protected: SoftRAID Monitor constantly watches your disks and alerts you if problems are detected
- Validated: Volume validation ensures sectors can be read and parity is correct
- Certified: Checks disks before use to ensure they are safe for data storage
- Vigilant: Error prediction helps protect against unexpected failure
- Universal: Move SoftRAID arrays seamlessly between Macs and PCs with built-in OWC MacDrive technology
SoftRAID provides a level of performance that you simply can’t get with hardware RAID. Learn more about the power of SoftRAID XT.
Connect to Thunderbolt and Thunderbolt 2 Systems with Ease
The OWC Express 4M2 is fully backward compatible with Thunderbolt and Thunderbolt 2. Utilize Thunderbolt 3 performance to work at full speed, and step back to Thunderbolt or Thunderbolt 2 whenever connectivity compatibility is needed for your workflow. Add a Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter along with the appropriate Thunderbolt cable, and you're all set.
OWC Thunderbolt 3 Cable
OWC Express 4M2 comes with an OWC Thunderbolt 3 cable which is Thunderbolt certified for Mac and Windows, with additional 0.5 meter to 2.0 meter lengths available separately.
Quality You Can Trust
Like all OWC drives, the OWC Express 4M2 is built to the highest standards of reliability and performance and Thunderbolt Certified for Mac and Windows. Because 100% reliability is always the goal, Express 4M2 is rigorously quality tested and backed by our one-year limited warranty plus award-winning, 24/7 customer support.
Your Digital Life…Protected for FREE
Backing up and protecting your data is critically important. But all too often it’s a task that falls to the bottom of the “to do” list, and you don’t realize it until it is too late. That’s why OWC has partnered with Acronis to give you 1 full year of the #1 personal backup and antivirus software to integrate into your workflow.
Acronis Cyber Protect Home Office safeguards you from today’s data threats—from accidents to failures to attacks. With easy, intuitive backup and Ai-enhanced antimalware technology, your digital life is protected—photos, files, applications, systems, and the devices they are on.
- Complete Backup and Fast Recovery: quickly restore your files or entire system at any time
- Easy Disk Cloning and Full Image Backup: just two clicks to start a full disk image backup
- Cloud, Local or Hybrid Cloud: back up locally, to the cloud, or both. It’s your choice
Learn more about Acronis Cyber Protect Home Office
- Up to one 4K display @ 60Hz,
- or one 4K display @ 30Hz,
- or two 4K displays @ 60Hz
Display Support by Port
- Mini DisplayPort 1.2: Up to 4K @ 60Hz
- All four drive bays are bootable on macOS. SSDs with 512 byte sectors require macOS 10.13 or later.
Hot Plug Support
- (1) Thunderbolt 3 - Alpine Ridge DSL6540
Data Transfer Rate (Maximum)
- Thunderbolt 3 : 40 Gb/s (or 5000 MB/s)
RAID Levels Supported
- RAID 0
- RAID 1
- RAID 4
- RAID 5
- RAID 10
- RAID 6
MTBF (Mean Time Between Failures)
- Varies depending on drive mechanism installed
Contact Start Stops
- Varies depending on drive mechanism installed
Mac OS Compatibility
- macOS 10.12 Sierra
- macOS 10.13 High Sierra
- macOS 10.14 Mojave
- macOS 10.15 Catalina
- macOS 11.x Big Sur
PC OS Compatibility
- Windows 10 32-bit Edition
- Windows 10 64-bit Edition
- Windows Server 2016
- When using one or more SSDs with 512 byte sectors, macOS 10.13 or later is required.
SoftRAID is compatible with Windows 10, or macOS 10.12 or later. Apple Silicon M1 Macs require macOS 11.3 or later. SoftRAID is licensed per computer. Additional seats available.
Host Port Requirements
- External UL-listed universal auto-switching power supply
External Power Adapter
- Two Thunderbolt 3 ports with 15W power delivery each.
Number of Bays
- (2) Thunderbolt 3 (USB-C) Ports
- (1) DisplayPort Port
- (1) 60mm 2,800RPM None cooling fan
- Height: 6.0 cm (2.4 in)
- Length: 11.3 cm (4.4 in)
- Width: 13.6 cm (5.4 in)
- Operating: 32°F to 104°F (0°C to 40°C)
- Non-Operating: -4°F to 158°F (-20°C to 70°C)
- Operating: -304.8 m to 3,048.0 m (-1,000 ft to 10,000 ft)
- Non-Operating: -304.8 m to 12,192.0 m (-1,000 ft to 40,000 ft)
- Maximum single drive performance is 817 MB/s Reads and 711MB/s Writes due to the bandwidth of the 1X PCIe3.0 bus.
- Hynix Gold P31 and Samsung PM981a SSD’s are only compatible with Windows 10 when installed in this enclosure.
- Does not support Dual-Mode DisplayPort (DP++), however it does support Multi-Stream Transport (MST) in Windows 10.
Manufacturer provided specifications for OWC p/n OWCTB3EX4M2SL
- (1) OWC Express 4M2 SSD Enclosure
- (1) Power Supply and Power Cable
- (1) Thunderbolt 3 Cable
- (1) Quick Start Guide
- (1) SoftRAID XT
- (1) SoftRAID XT Quick Start Guide (download only)
- 1 Year OWC Limited Warranty