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OWC Express 4M2 4-Slot M.... has been added to your Cart
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2 Year Data Recovery Plan

from After Solutions
  • Your Rescue Plan documents will be delivered to you via email only to the address associated with your Amazon.com account and can be found in your account message center within the Buyer/Seller Messages.
  • If your drive stops working, the Rescue data recovery plan will attempt to recover the data from the failed drive and recovered data will be returned on a media storage device or via secure cloud-based data storage.
  • Covers new solid state drives of any brand when purchased within 30 days (receipt must be retained for purchases not on the same transaction).
  • Free shipping for in–lab data recovery; 24/7 online case status tracking
  • If your data isn’t recovered, you get your money back

3 Year Data Recovery Plan

from After Solutions
  • Your Rescue Plan documents will be delivered to you via email only to the address associated with your Amazon.com account and can be found in your account message center within the Buyer/Seller Messages.
  • If your drive stops working, the Rescue data recovery plan will attempt to recover the data from the failed drive and recovered data will be returned on a media storage device or via secure cloud-based data storage.
  • Covers new Solid State drives of any brand when purchased within 30 days (receipt must be retained for purchases not on the same transaction).
  • Free shipping for in–lab data recovery; 24/7 online case status tracking
  • If your data isn’t recovered, you get your money back
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Sold by: OWC (Other World Computing)
Sold by: OWC (Other World Computing)
(6431 ratings)
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OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports with SoftRaid XT

3.9 out of 5 stars 78 ratings

$349.00
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0TB RAID

Enhance your purchase

Hardware Interface USB Type C
Brand OWC
Color Black
Item Dimensions LxWxH 4.72 x 12.2 x 7.87 inches
Hardware Platform Thunderbolt 3

About this item

    This fits your .
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  • Supports four NVMe Drives and aluminum enclosure featuring two Thunderbolt 3 ports
  • Compact, portable and light RAID system for on the go performance
  • Speeds up to 2800MB/s
  • Thunderbolt Certified for Mac and Windows
  • Comes with 1 Year OWC Limited Warranty

Frequently bought together

  • OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports with SoftRaid XT
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  • Samsung 970 EVO Plus SSD 2TB NVMe M.2 Internal Solid State Hard Drive w/ V-NAND Technology, Storage and Memory Expansion for
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Product Description

Pint-Sized Powerhouse

Small in stature. Big on capability. The OWC Express 4M2 is ready to serve with four easy-to-access M.2 NVMe SSD slots customizable for any workflow with vibration damping feet that allow for vertical or horizontal orientation. Install up to 8TB 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.

Built Smaller and Faster from Input by Pros Like You

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.

Multi-Drive

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.

SoftRAID: Conventional Wisdom Turned on its Head

It's often thought that hardware RAID is better than software RAID, but we've proven that not to be true. We've combined the performance and capacity of the OWC Express 4M2 with our robust SoftRAID engine. Experience breathtaking performance, multi-enclosure capability, advanced drive monitoring, e-notifications and downloadable updates. Once you do, you'll see how hardware RAID doesn't even come close.

RAID and Storage Spaces

The OWC Express 4M2 comes with SoftRAID Lite XT ready to be set up in RAID 0 performance or RAID 1 mirrored drive mode. So you can customize your Express 4M2 for speed or data redundancy. If you need more options, you can easily upgrade to add extra capabilities and RAID modes to meet any workflow demand.

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

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Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
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OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports with SoftRaid XT


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Customer reviews

3.9 out of 5 stars
3.9 out of 5
78 global ratings

Top reviews from the United States

Reviewed in the United States 🇺🇸 on June 11, 2020
Size: 0TB RAIDVerified Purchase
Customer image
3.0 out of 5 stars Mixed feelings
By MKP on June 10, 2020
As of early 2020 I don't know of many other devices that offers a 4-slot M.2 NVMe TB3 enclosure at this price - so if you are searching and nothing else has come out, know that this product is unique in the market right now (aside from the much more expensive OWC Thunderblade and some other weird stuff)
I am using it with 4 Inland Premium 2TB M.2 sticks.
First know that each SSD only gets 1 PCI lane, and Thunderbolt 3 only has 4 lanes to give - which means the only way to get full Thunderbolt 3 speed and capacity is to have 4 SSDs in RAID 0. This is not CLEARLY explained in the main description unless you read other reviews very carefully, but I knew that going into this. That really isn't the fault of the OWC Express 4M2 though - that is just the way the controller works. My larger issue is reliability....
In RAID 0 it is not reliable. I also tried RAID 4 for a while - also unreliable. Not sure if it is the SoftRAID software, the enclosure, or macOS 10.15 at fault.
1) Unreliable unmount. It would never unmount. Every time I tried to restart or shutdown my mac (iMac Pro), it would hang because the volume would not dismount - which would require me to force shutdown (hard power off). I eventually tracked this down to some software (a Docker MySQL container that was holding open files). I had to shut down the Docker container before attempting to restart or shutdown. Maybe you could blame Docker for this - but probably not. Docker containers running on an internal SSD do not prevent restart/shutdown, only when hosted on this enclosure. I send this to the OWC support in hopes that they would add it to the trouble shooting FAQ, but they just seemed happy that I solved my own issue.
2) Becomes read-only. In my use in RAID 0 and RAID 4 I experienced a situation where after a few days the volume became read-only. From what I can tell macOS will do this if it can no longer verify permissions of the volume. SoftRAID said the volume was healthy and nothing I could do would repair the permissions issue - I was locked out from writing to the volume. I had to rebuild the RAID and restore my files from another backup each time this happened.
3) This is minor, but it would be nice if it were a little quieter. It has fan, but that is what you get at this price point. It does seem crazy that you have to pay a LOT more to get a passively cooled enclosure from OWC like the Thunderblade - and the Thunderblade does not allow you to install your own SSDs - you pay a ton for those too.
I now have it running in RAID 1+0 and it has been stable finally - which is fine, but I'm taking a big hit on performance and capacity. Note that use of any RAID other than 0 or 1 will require you to purchase a license after 30 days - also not CLEARLY explained in the main description.
I was almost ready to return it, but there really is no better solution right now (for the price). Hopefully OWC improve on this product. I really do like OWC and have been a customer of various products for a long time. it would be amazing if OWC could do something crazy like take advantage of all 4 PCI lanes of TB3 for each drive, maybe requiring the use of 2 TB3 connections or different controller tech, updates to SoftRAID to specifically help the TB3 bottleneck?
Overall it is a cool product, but this type of product seems young and it kinda shows in the 4M2. Looking forward to trying out the next iteration/innovation in this space.
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Reviewed in the United States 🇺🇸 on August 23, 2022
Size: EnclosureVerified Purchase
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Reviewed in the United States 🇺🇸 on October 2, 2022
Size: 0TB RAIDVerified Purchase
Reviewed in the United States 🇺🇸 on January 9, 2022
Size: 0TB RAIDVerified Purchase
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Reviewed in the United States 🇺🇸 on November 30, 2018
Size: 0TB RAIDVerified Purchase
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Reviewed in the United States 🇺🇸 on November 4, 2022
Size: EnclosureVerified Purchase