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OWC Envoy Pro EX

240GB Portable, Bus-Powered USB 3.0
Storage Solution with OWC Aura Pro SSD

Mac / PC / USB 3.0
  • Mac
  • PC
  • USB 3.0
Ultra-portable, SuperSpeed bus-powered external SSD storage solution.
While elegant in design, the true beauty of the OWC Envoy Pro EX might be its rugged, high-peformance capabilities. Easily carried in a coat pocket, backpack, or briefcase, the anodized aluminum body securely houses an OWC Aura Pro 6G Solid State Drive offering 100x greater protection of your valuable data than even an Enterprise class hard drive.

With blistering fast transfer rates of up to 500MB/s, the Envoy Pro EX can handle any demanding storage and/or backup need in the office or on the road. And because it's USB 3.0 bus-powered*, the Envoy Pro EX doesn't require an AC power adapter, making it the ideal Plug and Play external storage solution.
Outstanding Features
Better by Design
"Mean Time To Failure" - We all know that nothing lasts forever. But that doesn't mean you shouldn't get the most out of your investment. The Aura Pro SSD utilizes DuraWrite™ Technology and highly intelligent block management to ensure the highest obtainable endurance and reliability. As a result, the Aura Pro equipped Envoy Pro EX can operate for years in demanding use applications without daily write restrictions. This adds up to a MTTF that is higher than most enterprise class hard drives and SSDs on the market today.

Additionally, as there are no volatile memory elements in the Aura Pro, the need for cache is completely negated. The Envoy Pro EX drive is just that fast from the get-go!
Proven Engineering
The Aura Pro 6G offers leading performance with a time-proven design. We drew upon our experience in developing the first and only SSD upgrades for 2010-2012 MacBook Air to create the industry's only upgrade for Apple's revolutionary MacBook Pro with Retina display. As a result, you will experience the highest quality and reliability offered in an external SSD-based drive.

*Requires USB 3.0 standard powered port. USB 2.0 use not supported or recommended.


Envoy Pro EX includes
  • OWC Envoy® Pro EX USB 3.0 bus-powered Storage Solution with an OWC 240GB Aura® Pro SSD inside.
  • Carrying Case
  • High-quality double-shielded USB 3.0 standard A to Micro-B connecting cable
  • Envoy Pro EX Owner's Manual
  • 3 Year OWC Solution Limited Warranty with
    48-Hour Service Turnaround Time


OWC Envoy Pro EX Specifications:


  • 240GB OWC Aura Pro SSD
    1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less). The actual total capacity will depend on your own defined file settings/preferences.


  • High-performance ASMedia 1053e chipset

Interfaces Supported

  • USB 3.0 interface

Port Configuration

  • USB 3.0 interface (Micro-B port)

Max Data Transfer Rate

  • One Micro-B USB 3.0 port, up to 500MB/s


  • Bus-powered via USB 3.0 port (no AC adapter required)
  • Anodized aluminum finish
  • Super-quiet, fanless operation
  • Non-skid rubber feet

System Requirements

  • Mac® Requirements: Mac OS 10.3 or later and an available and supported USB 3.0 port.
  • PC Requirements: Windows XP or later and an available and supported USB 3.0 port.
  • Linux® Requirements: Linux OS versions and an available and supported USB 3.0 port.

UASP (USB Attached SCSI Protocol) Compliant

  • Yes


  • Silent, fanless operation

Power Supply

  • Bus-powered via USB port (no AC adapter required)

External Case Dimensions

  • 2.125 in (W) x 4.5 in (D) x .4375 in (H)
  • 53.98 mm (W) x 114.3 mm (D) x 11.11mm (H)

Enclosure Weight (no accessories)

  • 3.4 ounces
Operating Environment:

Environmental (Operating)

  • Temperature (°F) 32°F to 158°F
  • Temperature (°C) 0°C to 70°C

Environmental (Non-Operating)

  • Temperature (°F) −40°F to 185°F
  • Temperature (°C) −40°C to 85°C


  • Idle (Typical) 0.0 bels
  • Seek (Typical) 0.0 bels


3 Year OWC Solution Limited Warranty

The best warranty is one you never have to use, but should the need occur - OWC is proud to provide a superior level of support and warranty coverage to our customers. Even when not used, we understand the peace of mind afforded by a longer warranty period. OWC's industry leading coverage is a testament to our confidence in the reliability of the solutions that we offer. OWC solutions are engineered to demanding quality standards in order to deliver the most reliable, highest performance available on the market in each storage category.

View more information about the 3 Year OWC Solution Limited Warranty

Manufacturer provided specifications for Other World Computing p/n ENVPROU3S240 UPC#: 794504323153


Click any of the benchmarks below to view the results.


Customer Ratings

Write a Review 4.6 / 5 5 out of 5 (100%) reviewers would recommend this product
Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Chalfont, PA Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great price and value. Works just fine! December 7, 2015 Great price and value. Works just fine!

I would recommend this item to a friend!

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Torrance, Ca Age: 55-65 Experience Level: Home User Owned Product: 3-4 months
Rating: 5/5 Great Backup drive November 29, 2015 I use this to backup a Macbook Air. It is perfect. Plug it in backup and unplug. Perfection! OWC is a class act. Quality stuff , very helpful at reasonable prices. I have sent countless people to OWC after their cheap product failed or couldn't find what they wanted. OWC is great and dependable.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Culver City, CA Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 4/5 Small. Fast. A little pricey. January 21, 2015 I needed to quickly move large video files from a capture mac, to an editing workstation, to various laptops for presentation. USB keys large enough are too expensive. At 240GB, this has more than enough space for my needs, I just wish there were a 1TB size unit to clone my laptop while in the field.

It's a very fast and compact device. Very nice looking and easy to pack in a briefcase.

USB 3.0 seems speedy enough to move the larger files around quickly. The SSD is quick enough. I know there are some that say this unit "speed tests" well, but real world, doesn't perform it. I find that with a lot of USB devices, real world results will vary. It's faster than the USB 3.0 keys it replaced...holds more, looks nice...I'll keep my eyes on it as the price, hopefully, continues to get lower and capacities increase.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Sunnyvale, CA Age: 45-54 Experience Level: IT Professional Owned Product: less than a month
Rating: 4/5 Fast, attractive, and very quiet (but not silent) May 23, 2014 In my tests (using Drive Genius 3 on a "Late 2013" 27-inch iMac 3.2 GHz i5 with USB 3 through a NitroAV hub) the drive peaked at about 380 MB/s -- plenty fast for my purposes. The enclosure is sturdy, compact, and pleasing to look at.

Curiously, this SSD is not completely silent -- it makes faint little squeaks when accessed. But it's still far quieter than any rotating hard disk I've ever encountered, including the tiny ones in early iPods.

I would recommend this item to a friend!

Response from MacSales.com, Executive May 28, 2014 The SSD itself is absolutely dead silent - that being said - with any drive/or system, independent of which drive, etc, it is normal to here some 'activity noise' emit from the computer at a very very low level and typically does correlate with drive and processor activity.
Verified Buyer
Reviewer: Anonymous Location: Aspen, CO Age: 45-54 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Super compact, great design, faster than advertised November 10, 2013 I bought the 240GB Envoy Pro EX SSD as a travel drive for my new 13” Retina MacBook Pro with it’s crazy fast PCIe 1TB SSD which moves data around at nearly 1,000MB/s. I saw benchmarks of around 430 / 430 using Blackmagic Speed Disk Test on the Envoy so I was already pretty happy with that to begin with. But when I moved a 202GB folder of large RAW files over to my new MacBook Pro, I was floored by what I saw. I both timed it and watched the activity monitor utility, it moved the folder over in less than 6.5 minutes and I saw average write / read times of 520MB/s!!! A lot of people call out the theoretical limits of USB3 as being way too optimistic in regards to real world data rates and up until this point I generally agreed. But between the “Black Hole” effect of the new PCIe SSD drives in the latest MacBook Pros and this Envoy Pro SSD, folks, you can believe it. Between the beautiful design, super small size and earth shattering real world performance, this is without question the best external drive for a traveling laptop user I could imagine, simply brilliant!

I would recommend this item to a friend!

OWC 240GB Envoy® Pro EX Mfr P/N: ENVPROU3S240 MacSales.com SKU: OWCENVPROU3S240Portable, Bus-Powered USB 3.0
SSD Storage Solution
3 Year OWC Limited Warranty Ships: Same Day only $199.99
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