Solid design, very easy to install the SSD (I got the bare version). And this is screaming fast. Zero effort getting it working with MacOS.I really don't like the fans in some enclosures - the make noise and can fail. If you have a drive with no moving parts what's the point of having an enclosure that has a moving part? Since this enclosure is essentially 100% heat sink it doesn't need one.It is somewhat larger than other enclosures that have similar functionality. But the overall design gives me more confidence in its reliability than others that I have seen and used. In my application it's sitting permanently on my desk so it never needs to go in my pocket anyway.Highly recommended.

Sauber verarbeitetes Gehäuse, das ich mit einer 2 TB "Samsung EVO 970 plus" bestückt habe. An einem Mac Min M4 pro erreiche ich damit ca. 2000 MB schreiben und 3000 MB lesen. Neuere Samsung Platten sind da sicher noch ein bisschen fixer. Aber für den normalen Gebrauch sollte es alle mal langen. Das LLM "llama 3.3 70B" steht nach 5 Sekunden bereit.Das Originalkabel lässt es gerade zu, die Platte neben den Mac zu platzieren. Die weisse LED hätte was kleiner sein können, da sie sehr hell leuchtet. Im Betrieb wurde sie nur handwarm.Dass die Platte lüfterlos ist, ist sicher ein großer Gewinn.

Good construction and performance

I've transferred a bunch of stuff to it from my M4 MacMini onto a Samsung 990 EVO 2TB drive I installed within. No disconnects so far and the transfer speeds are okay, not as fast as claimed (getting in the low 2000's, not the advertised 3,300 speed, not sure why...). Will continue evaluating this to see what's up with this drive. 5 stars for now.UPDATE: Still works a treat. Get this instead of the Zikedrive. All day long. The Zikedrive was inconsistent with the same cable and SSD, something flaky in it. This drive - NOT flaky. Plus if you need to return it, you don't have to pay to ship it back to China which is absolutely the case with Zike.

It was quick and easy to add the SSD to the enclosure, had it connected within 5 mins.I also liked that It's solid and reassuring feels weighty. Aesthetically it looks great next to the dark/grey monitor, MacBook and Thunderbolt hub.

MacBook M3で使用してますが、安定して早いです。安価で高速。いい買い物しました。Thunderbolt5早く出てほしいです。

Like a lot of people I was tempted recently by the Mac Mini M4 base model and its value proposition. Of course, only having a 256GB SSD for storage is a problem and Apple charges a ridiculous amount for additional storage so I decided to build an external drive. That's where this OWC 1M2 enclosure comes in. I researched the available enclosures and this one stands head and shoulders, or should I say aluminum fins above the competition. Unlike most others, the 1M2 is a solid block of aluminum with huge heat-dissipating fins that permits your m.2 nvme ssd module to run at full speed without throttling. It certainly does for the 2TB WD Black module I used, which runs warm when busy but does not throttle.Assembly of the 1M2 with your SSD module is easy plus there are lots of tutorials on YouTube. OWC includes a short Thunderbolt 4 cable which works perfectly. Of course you want to connect the 1M2 to one of the Thunderbolt 4 ports on the BACK of the Mac Mini, not the front ports which are much slower.My speed tests speak for themselves: 3200MB/s Write, 3145MB/s Read (Blackmagic benchmark). This is WAY faster than the onboard 256GB SSD and astonishingly good for an external drive. I relocated my user folder to the external disk (again lots of YouTube howtos, I recommend the ones by Mac Sound Solutions). It was easy to do and works extremely well.I am delighted with the 1M2 enclosure and recommend it without reservations. Don't be tempted to skimp and go with a cheap solution. You don't want heat buildup to throttle your disk speeds or worse, shorten the life of your SSD module. Packaging is 100% recyclable which is nice to see.

Il case e' realizzato in un monoblocco di alluminio modellato come dissipatore termico fortemente alettato con l'alloggiamento per una unita' M2. Raggiunge una velocita' di circa 3000Gb/s. Ottimo per abbinarlo ad un Mac per allocarvi la directory Home e avere uno spazio di lavoro estendibile fino a 4T per Mac con 256/512G, a costi molto piu' contenuti di un upgrade dello stesso Mac. Con tale velocita' permette anche di avere l'intero sistema operativo Mac sull'unita' esterna.La grande alettatura mantiene al temperatura operativa a livelli molto bassi evitando il trottling dell'M2. Un po' costoso, ma e' al top.

This passive heat sink makes your M2 ssd perform the way you expect even when it is in heavy use. I have tried a few and this is by far the best ssd enclosure I have found.

I paired the OWC Express 1M2 with a Crucial T700 4TB Gen5 NVMe M.2 SSD and experienced excellent results. I had previously tried a P3 Plus drive but I wanted better performance so decided to spend extra on the Crucial T700 for when I need the performance. Tested with an M4 Max with Thunderbolt 5 + Thunderbolt 5 cable. Results were nearly identical with USB-4 cable. This enclosure can exceed the "3151MB/s real-world performance" with the right NVMe M.2 SSD. I would suggest an NVMe M.2 SSD with cache if your budget allows.OWC makes excellent products and has fantastic customer service and support. The case is beautiful.

UPDATE: Still the best enclosure! Had a Predator GM7000 lying around and the 1M2 was once again the only USB4 enclosure that worked with it. It's the only USB4 enclosure good enough I bought it twiceTL;DR: The OWC 1M2 is really good because it runs the coolest and is super reliable. The only downside is that replacing the SSD is a hassle once it’s seated inside.I’ve owned the Konyead, Zikedrive, Satechi, and Ugreen USB4 enclosures before purchasing the 1M2. I think the OWC 1M2 is the best out of the five, though not completely perfect.Quick explanation as to why I own all these: I work in film, and transferring multiple terabytes is common. USB4 drives let you do that extremely quickly. The only options for USB4 drives (as of writing) are the SanDisk or Glyph Pro series, which are horribly overpriced (and in SanDisk’s case, even destructive), or enclosures with the asm2464pd controller, which is currently the only one designed for USB4. While these enclosures aren’t cheap either, pairing them with an SSD like the WD SN850X, which has dropped massively in price, gives you fantastic speed for the cost.The OWC 1M2 is really big—bigger than even a 2.5" SATA enclosure (pictured in the second photo). USB4 enclosures are already large by M.2 enclosure standards, mainly for heat dissipation. PCIe Gen 4 SSDs can run as hot as 80°C or even 90°C if you’re using the SN850X, but the 1M2 excels at cooling. The entire enclosure is covered in large fins, and none of my other enclosures come close. Here's why that matters: all my other enclosures get very hot under load. The 1M2, being so over-the-top with cooling, only gets warm to the touch. That’s a huge win. With the others, I have to wait for them to cool down after big transfers. The 1M2 is always cool enough to keep going.In my setup, I use 4TB SN850X or FX900 Pro SSDs. For some reason, the only enclosure that works perfectly with the FX900 is the 1M2. I believe manufacturers write custom code for the 2464 controller, and OWC has written the best code for SSD compatibility. Moving between Windows and macOS, the 1M2 never drops a connection and handles full drive writes really well. The only other enclosure I own that’s equally reliable is the Zikedrive. The Satechi and Ugreen have some rare, forgivable edge cases, while the Konyead is basically toast. I also appreciate that the 1M2 came with reasonably new firmware for the 2464 controller, unlike the others, which I had to update.My only complaint is the design. Out of all the enclosures, the 1M2 seems the least portable. It has large rubber feet on the bottom, and unlike the others (except the Konyead), it’s designed to be upright only. That’s fine, but the annoying part is the screws—hidden behind the rubber feet that you have to tape on yourself. So, once your SSD is seated, replacing it requires removing the rubber feet and unscrewing everything again. Definitely make sure your SSD works 100% before taping the thing shut!