OWC Envoy Pro Mini review

Small and versatile flash drive

Envoy Pro Mini portable SSD
(Image: © Mark Pickavance)

TechRadar Verdict

While the engineering in the Envoy Pro Mini is exceptionally elegant, as a portable SSD, it’s a bit mediocre. While easily one of the most portable 1TB SSDs we’ve seen, you pay a high price for that milled-from-metal form compared with alternative brand options.


  • +

    High-grade engineering

  • +

    Both USB-A and USB-C without cables

  • +

    Small enough to easily pocket


  • -


  • -

    Performance isn’t special

  • -

    Limited capacities

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Two-minute review

OWC, aka Other World Computing, has a long and justifiably impressive resume for delivering very high-quality peripherals for both the Apple Mac and PC owner.

The Envoy Pro Mini takes the core NVMe technology found in its Envoy series and compacts it into a shiny metal construction the size of a stick of gum.

For those unsullied by gum use, that’s a shape that is 8cm long, 1.7cm wide and 1.1cm deep, weighing just 26g.

Rather than using a conventional blade design, OWC went with a rotating section that contains the SSD components and a USB Type-A blade, and an adapter end that mounts a capped USB Type-C connector.

By spinning the SSD section, it can be used with either type of USB port. When carried, neither of the blades is exposed, cleverly.

The cap is retained with a rubberised loop so it can’t be mislaid, and near it is a small through-hole that is designed for a lanyard that OWC include in the box.

When connected to a host system, the end of the SSD section glows to display activity, though it is possible to arrange the drive when using Type-A ports so that this isn’t visible.

The available capacities are 256GB, 512GB and 1TB, though the cost per GB is on the high side for external storage.

OWC offers a 3-year limited warranty on the Envoy Pro Mini. However, it should be noted that it isn’t waterproof, and the company makes no claims about its resistance to being dropped or dust ingress.

As external SSDs go, this one isn’t the quickest around, but it’s beautifully made and designed for those that need up to 1TB that they can hang around their neck or place on a key fob.

Envoy Pro Mini portable SSD

Being the size of a pack of gum makes this drive very portable (Image credit: Mark Pickavance)

OWC Envoy Pro Mini price and availability

  • How much does it cost? From $79 / £84.99
  • When is it out? It is available now
  • Where can you get it? Direct from OWC, and a few smaller online retailers

Directly from OWC in the USA, the three capacities of the Envoy Pro Mini are $79, $109, and $179 for the 256GB, 512GB, and 1TB drives, respectively.

Currently, the drive isn’t available through online retailers like Amazon, but it is likely to arrive there soon.

On a cost-per-gigabyte basis, the best value drive in the range is 1TB, but it is still one of the most expensive external SSDs around. For comparison, the Crucial X6 1TB has a similar performance profile but a price tag of near $90.

Therefore, if you are willing to swap cables to connect to different USB standards and not have a drive milled from solid aluminium, you could save plenty or get more capacity for your cash.

Envoy Pro Mini portable SSD

(Image credit: Mark Pickavance)
  • Value score: 4/5

OWC Envoy Pro Mini design

  • Dual USB standards
  • Easy to transport
  • No hardware encryption

The OWC Envoy Pro Mini that was sent to us for review came with the following hardware:

Interface: USB 3.2 Gen 2
Connector: Type-C and Type-A
Package Includes:  Drive and lanyard
Capacities4: 250GB, 500GB and1TB
Speed: Up to 950MB/s read, 800MB/s write
Dimensions: 80mm x 17mm x 11mm
 USB 3.0/USB 3.1/USB 3.2 Gen 2
Security specification: N/A
Warrant: Limited 3-year warranty
Compatible with: Microsoft Windows, macOS, Linux, Chrome OS or any system that supports a USB mass storage device.

When flash drive designers make something as small as the OWC Envoy Pro Mini, they either go with a switchblade concept where the blade retracts into the drive. Or, as in this case, a hinge is made to allow the drive to rotate and be inserted into the rest of the assembly.

This approach cleverly provides a means to cover both USB standards, as the hiding of the USB Type-A blade inserts it into an adapter for USB-C.

Both these interfaces are USB 3.2 Gen 2, allowing the best speeds irrespective of which interface is being used.

Our only reservation about this design is that when the drive is used in USB-C mode, the unit is at its maximum length, creating a long metal lever on the USB-C port should anything hit the drive or the laptop accidentally drops.

When the drive is used with the Type-A blade, the length is reduced, minimising the potential for port damage.

Envoy Pro Mini portable SSD

Pulling the cap off reveals the USB-C blade (Image credit: Mark Pickavance)

When plugging in the drive for the first time, our 1TB review device appeared to be only 8GB in size, as only a small part of the volume is made available that contains configuration apps for both Mac and PC. Running this tool on a PC allows the drive to be formatted in NTFS.

As a piece of mechanical and electrical engineering, the Envoy Pro Mini is impressive. The solid block of aluminium from which it has been cut serves to provide a simple but effective means to cool the contents while operating.

If there is a weakness in its design is that the SSD electronics have no hardware encryption, although it is possible to use encrypted software partitions and achieve similar results.

Envoy Pro Mini portable SSD

Reversed for Type-A use (Image credit: Mark Pickavance)

Design score: 4/5

OWC Envoy Pro Mini performance

  • Mediocre performance
  • Outclassed by Thunderbolt drives

This is how the Envoy Pro Mini performed in our suite of benchmark tests:

CrystalDiskMark 8.0.4: 928MB/s (read); 861MB/s (write)
ATTO:  887MB/s (read, 256mb); 823MB/s(write, 256mb)
AS SSD: 581MB/s (seq read); 590MB/s (seq write)
AJA: 795MB/s (read); 791MB/s (write)

Very conveniently for those looking for benchmarks, OWC has a wide selection of tests that they have performed on PC and Mac to show the speed of this unit.

These official results also show Gen 2 USB port speeds and the negative impact using a Gen 1 port has on that performance.

But in our testing, we never got above 1,000MB/s, either reading or writing. By selecting 0Fill mode of CrystalDiskMark 8.0.4 and using the highly optimistic Default mode, we only saw 928MB/s reading and 861MB/s writes.

Perhaps with a faster test rig or an M1 Mac, the potential speed might hit 1,000MB/s, but this is something easily achievable with other drives that don’t need 0Fill or default mode.

In CrystalDiskMark real-world mode, the read speed dropped to 737MB/s and write to 823MB/s, levels that were backed up with other benchmarks.

In the AJA systems test, we saw closer to 800MB/s across the board, and those numbers were generally supported by ATTO Disk Bench Mark.

It should be noted that if you only have a 5Gbit USB port as per the original USB 3.0 or USB 3.2 Gen 1 as it has been relabelled, then read and write speed will be below SATA SSDs, at around 450MB/s.

As external SSDs go, the OWC Envoy Pro Mini isn’t anything spectacular in the performance stakes. If you want the best external drive performance, then either USB 3.2 Gen 2x2 or Thunderbolt technology is required.

  • Performance score: 3/5

When you get over the aero-grade construction and elegant design, what remains is an expensive SSD with average performance.

Those wanting faster external drives can use one designed for USB 3.2 Gen 2x2 or Thunderbolt, and OWC makes plenty of the latter.

If you want something highly portable, the Envoy Pro Mini certainly fits that billing, but the cost is prohibitive, especially if this is for personal use.

Envoy Pro Mini portable SSD

(Image credit: Mark Pickavance)

OWC Envoy Pro Mini score card

Swipe to scroll horizontally
DesignMilled from aluminium with both USB-A and USB-C blades inbuilt, it's classy in every department.4 / 5
PerformanceQuicker than a SATA drive but nothing special when compared to Thunderbolt external SSDs. 3 / 5
ValueThe cost per GB is high, almost double what you can pay elsewhere3 / 5
OverallA lovely design that is pleasing to use if you can ignore how expensive it is.3 / 5

OWC Envoy Pro Mini Pro?

Buy it if...

You can afford it

Having equipment constructed to this high specification is nice, but only if the price is at a level your business or you can afford. Cheaper options are available with greater capacities, but most don’t exude the same level of quality.

Portability is paramount

Most people have experienced an external drive with missing or broken cables. The Envoy Pro Mini negates that by being ready to use without any cables or accessories.

Flexibility is important

Being able to work with either a USB-A or USB-C port is helpful, and almost any current version of Mac OS or Windows. This drive shouldn’t present you with an incompatibility issue.

It's also bootable if that's important.

Don't buy it if...

You need more capacity

With the cost of NAND modules in a power drive, expect to see very large SSDs in the coming year. Already some portable drive makers are offering 4TB, and soon that will be 8 or 16TB. At that point, 1TB might seem to be a small capacity.

You need ultimate performance

Currently, the fastest external drives are made for Thunderbolt and/or USB 3.2 Gen 2x2. These can achieve 2,000Mb/s transfers, double that of the Envoy Pro Mini. When USB 4.0 is available, the speed of this drive might seem slow.

Security is important

The SSD in this drive doesn’t support hardware encryption, which is generally considered the best way to protect the contents from invasive hacking techniques. You can use software encryption with it, but that assumes decryption software is installed on all the machines you intend to use with it.

Also consider 


Sabrent Rocket XTRM-Q

Rather than an external drive, this is an enclosure that accepts an M.2 NVMe drive up to 4TB and will then connect it to both USB and Thunderbolt systems.

It is possible to get read speeds of up to 2400 MB/s with the right drive, and you can use SSDs with hardware encryption baked in.


Kingston XS2000

A small drive that supports USB 3.2 Gen 2x2 for speeds close to 2,000Mb/s and at almost half the cost of the Envoy Pro Mini. It might not have the drop-dead gorgeous engineering, but in terms of raw speed and low price, it’s a winner.

Read our Kingston XS2000 review for more details


SanDisk Extreme Portable NVMe

A water and dust-proof design with a similar performance profile to the Envoy Pro Mini, the Extreme (not Extreme Pro) is affordable, resilient, and widely available.

Same speeds, and better environmental protections, but at a much lower price.

Read our SanDisk Extreme Portable review for more details.

Mark Pickavance

Mark is an expert on 3D printers, drones and phones. He also covers storage, including SSDs, NAS drives and portable hard drives. He started writing in 1986 and has contributed to MicroMart, PC Format, 3D World, among others.