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OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports


$249.99
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Hardware Interface USB Type C, Thunderbolt
Brand OWC
Hardware Platform Windows
Material Aluminum
Memory Storage Capacity 32 TB

About this item

  • 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

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This item: OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports
$249.99
Total price: $494.93
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Top Brand: OWC

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OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports
OWC Express 4M2 4-Slot M.2 NVMe SSD Enclosure w/ Thunderbolt3 Ports
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ACASIS 40Gbps M.2 NVMe SSD Enclosure, Tool Free Installation, TBU 401 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key (TBU401)
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Price$249.99-11% $399.99
List:$449.99
$199.00$89.99 
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Get it as soon as Friday, Nov 8
Get it as soon as Friday, Nov 8
Get it as soon as Friday, Nov 8
Get it as soon as Friday, Nov 8
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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
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Product Description

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. 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. You can 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. 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 Express 4M2 comes with an OWC Thunderbolt 3 cable which is Thunderbolt certified for Mac and Windows.

Customers say

Customers like the build quality and size of the hard drive enclosure. They mention it's stable, compact, and saves space and ports. Customers also appreciate the ease of setup. However, some customers have reported that the fan is loud and makes weird noises. They dislike the software. Opinions are mixed on the speed, functionality, and heat dissipation.

AI-generated from the text of customer reviews

Top reviews from the United States

Reviewed in the United States on March 11, 2023
Size: EnclosureVerified Purchase
I bought this for "bulk storage" through thunderbolt. The options are shocking limited unless you are looking at $500+, which I was not. With falling ssd prices, filling this with 4x2tb WD Blue nvme ssds was a very good value (roughly $700). Speed is, well, as advertised. There are practical limits to the thunderbolt spec so each drive gets a single pcie lane. This translates to about 800mbps in CrystalDiskMark, with 2 and 3 scaling linearly. 4x tops out at 2700mbps, which again, this is more a limit of the thunderbolt spec than the device. The best part is that since each drive get it's own lane, you can actually use this as a raid device! USB controllers suffer from bandwidth bottlenecks, with an enclosure needing physical raid to achieve speed. Not here. Thunderbolt does all the heavy lifting.

Overall, very satisfied with the performance.

My only gripe is the noise. Please OWC, just put a decent fan in the damn thing and charge $5 more, or have it be temperature controlled, something. It sits ~6ft away and you can 100% tell it's there and running. Seems like a stupid place to cheap out especially since the whole thing is surprisingly user serviceable with only phillips heads needed to install the drives and made with very solid metal construction
9 people found this helpful
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Reviewed in the United States on April 11, 2023
Size: EnclosureVerified Purchase
So far this has been working fabulously for me. Yes the fan is too loud but overall performance of the enclosure itself with the way I have it configured as been perfect for me.

I am using this as my primary RAID for video production. Mainly editing 4k and 6k .BRAW 8:1 footage - usually @ 23.97fps, but sometimes 60fps as well. I’m currently on the 2023 version of Premiere with Mac OS Ventura. This things screams. Tested with the BlackMagic Disk Speed Test app I’m getting just over 2900 MB/s.

I’ve loaded it up with 4x 2tb Samsung 970 EVO Plus’s and built as a RAID 0 using Mac OS Ventura’s Disk Utility and formatted as GUID APFS. I did not want to be bound to OWC’s SoftRAID software because I need this to occasionally move to different Macs and I don’t want to rely on a 3rd party piece of software to access my data.

Getting 4 fast M.2’s and doing a RAID 0 is the key to getting the enclosure’s advertised speed. I see many people make the mistake of only putting one or two drives in, or doing a RAID 1 on 4 drives. I knew this going into it and already had most of the M.2’s on hand so it wasn’t an issue for me, but something for everyone to keep in mind.

I’ve tested the daisy chaining ability out by connecting a USB-C monitor that has a keyboard and mouse KVM’d to it and the Mac sees everything and I cannot detect any r/w performance hits when using it. I have not tested the display port on this yet.

Power-wise the enclosure automatically powers down overall, once my Mac has turned off. I say “overall” because the fan and front LED turns off and the M.2’s do not generate any more heat so I assume they are off. But the blue LEDs inside are still lit.

Speaking of heat. The M.2’s generate a ton of heat. And as many of you probably know by now, the fan is pretty loud. To that end, I decided to take the advice of other users online and purchased low profile copper heat sinks for them. I also changed out the very loud 12v 60mmx15mm fan with a 24v one. Because the enclosures is only providing 12 V to that fan, it spins at half speed. That has cut down the sound issues considerably and seems to keep air moving well. The unit feels cooler than it was before the fan and heatsink upgrade.

For those of you who would like to do the same.

This is the fan (its a tad smaller at 10mm thick”:
https://a.co/d/8IbOUmL

The fan needs a 2-3 pin adapter:
https://a.co/d/gzv6xqD

And the heat sinks:
https://a.co/d/7fW4Whh
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67 people found this helpful
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Reviewed in the United States on January 28, 2024
Size: EnclosureVerified Purchase
In order to get the advertised speeds, you will need to run 4 drives at RAID 0. I chose to not get SoftRaid and just use apple disk utility to set up the Raid as it's more reliable imo.

I'm using 4x Samsung 990 Pro 2 TBs, overkill for this for sure, but again I wanted something reliable and they weren't too much more expensive than 980 pros.

My real complaint is the fan, it's noisy. If you're working in a noise-sensitive environment you'll hear it and you'll hate it. Since I planned to put low profile 2mm heatsinks on all 4 drives, I decided to use a 92mmx15 slim noctua fan I had laying around. The size is perfect to cover all 4 drives so that they would be cooled equally, I used a low-noise adapter since the fan basically runs at full speed. I used some rubber mounts that came with my noctua and just position it so that the fan doesn't touch any surface and it wouldn't move about when using the enclosure vertically or horizontally.

This is an expensive piece of kit, but compared to others on the market, this has the best build quality. Just wish they include a quieter, bigger fan and allow more space for larger nvme heatsinks.
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5 people found this helpful
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Reviewed in the United States on September 26, 2023
Size: 0TB RAIDVerified Purchase
Cons:
-Fan is on the louder side, not ideal for quiet spaces
-No SoftRaid Software included (I bought the package deal)
-No off button (you have to unplug it to turn the fan and Blue LED light off)

Plus:
-It's small
-It's FAST (RAID 0)

If you buy it, I recommend getting the enclosure without the software and saving yourself the extra cost because there's a good chance you won't receive the software (at least if purchased over Amazon). Overall, I'm more on the disappointed side.
2 people found this helpful
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Top reviews from other countries

Timothy Woodard
5.0 out of 5 stars This is a quality product
Reviewed in Canada on October 2, 2024
Size: 0TB RAIDVerified Purchase
(Purchased Sep, 2024), From the construction materials to the packaging, it is apparent from the start that this is a quality product. Unlike the previous reviews, the fan is virtually silent, so OWC has improved their product. The enclosure comes with a 3-year licence of SoftRaid v8 premium. The marketing information on this amazon site leaves allot to be desired as I had to do extensive research to find this out. I also had to open up a chat with OWC Support and was able to determine that the M.2 drives I had were not compatible. They are NVME Sata format, not NVME SSD as specified. Again, this amazon site is VERY confusing as to which hdd's are compatible and which are not!
This is a quality product from packaging, to materials to support.
Amazon Customer
5.0 out of 5 stars Compact
Reviewed in the United Kingdom on September 9, 2024
Size: EnclosureVerified Purchase
Needa a screwdriver but otherwise fine

Beware of payment needed after one month to use service.
VML
3.0 out of 5 stars Does the job
Reviewed in Belgium on October 15, 2023
Size: EnclosureVerified Purchase
Too noisy fan.
Jack12
5.0 out of 5 stars It does the job
Reviewed in Germany on May 2, 2023
Size: 0TB RAIDVerified Purchase
Zugegebenermaßen ein wenig schwer auf zu bekommen, aber nach der Installation funktioniert das Drive reibungslos. Dazu gibt es noch eine leider nicht kostenfreie Software, Die ich aber jedem empfehlen kann.
Ich selber habe das Modul mit vier NVME à vier Terabyte Voll ausgebaut und es schnurrt wie eine Katze. Die Geschwindigkeit beim Kopieren ist atemberaubend.
Trotzdem finde ich das Gerät ein wenig überteuert.
PEDRO MARSIÑACH
4.0 out of 5 stars que puedes operar en raid o no discos M.2
Reviewed in Spain on January 21, 2021
Size: 0TB RAIDVerified Purchase
Funciona muy bien, pero el ventilador es muy ruidoso. (supongo se podria canviar por otro)