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OWC Mercury
On-The-Go® Pro

1.0TB Portable External Drive

Mac / PC / Thunderbolt
  • Mac
  • PC
  • USB 3.0
The "Go Anywhere" Bus-powered, Portable Drive for Mac and PC
Weighing only 12 ounces (0.34 kilograms), the OWC Mercury On-The-Go Pro is a reliable portable companion that's at-the-ready to handle life's critical data be it images, audio, video, backup, and more. It's stylishly engineered in a sleek, impact-resistant, and transparent acrylic enclosure that reveals the On-The-Go's inner workings.
Thunderbolt Fast + Thunderbolt Powered
Simply connect the On-The-Go Pro to your Mac or PC via the included Thunderbolt cable to experience true high performance. The Thunderbolt interface provides so much bandwidth that the internal drive mechanism operates at full speed, just as if the drive were internally installed into your computer. Now that's fast!

All that speed comes through the Thunderbolt port, and so does the power. No fumbling for power adapters or looking for power outlets. Just plug in the included Thunderbolt cable, attach to your Mac or PC, and the On-The-Go powers right up.
Ultra-Portable and Durable
The On-The-Go's case is made of a durable crystal clear acrylic that provides a gap of air around the drive and shock absorbing rubber feet - all to keep the internal drive mechanism better protected from the rough and tumble of life on the go.

Its small size and included traveling case make it easy to take the On-The-Go wherever you go. At only 12 ounces, whether you travel with it all by itself or with your other gear in a laptop bag, briefcase, or backpack the On-The-Go is light and easy to carry.
Fanless Cooling
A fanless design makes the On-The-Go operate in near silence while the built-in aluminum heatsinks and air vents work in tandem to cool the On-The-Go. This ensures your On-The-Go remains a trusted digital companion with a long and reliable life.
The Perfect Portable Makes a Great Desktop Drive
While On-The-Go is perfect for traveling, it also makes a great desktop drive. Your desktop will be clutter free with a single Thunderbolt cable used for both power and data, and the On-The-Go's small size requires minimal desktop space.
Thunderbolt Cable Included
We don't like external drives that require you to buy a cable to make it work correctly. That's why we include all cables needed for connectivity with all of our external drives, and Thunderbolt drives are no exception. It's just how we think it should be done. So don't bother hunting for a Thunderbolt cable, we've got ya covered with an OWC premium quality, certified, 0.5 meter Thunderbolt cable included.
SpeedTools Utility Suite for Mac
The comprehensive Mac utility used by professionals for accurate Mac diagnosis and maintenance.
Prosoft Engineering® Data Backup 3 for Mac
Data Backup makes it easy to backup to FireWire and USB drives, network drives, CDs and even DVDs.
Click the SOFTWARE tab below to learn more »


  • Mercury On-The-Go Pro
  • OWC 0.5 meter Thunderbolt cable premium quality, certified
  • Auto-setup/partitioning utility for OS X & Windows - See User guide
  • Utility software bundle for Mac and PC
  • On-The-Go Thunderbolt User Guide (586KB PDF)
  • Carrying case


Product Specifications

Bus Interface

  • Thunderbolt


  • Thunderbolt

Standard Mechanism

1.0TB Western Digital Scorpio Blue Specifications:


Form Factor
2.5″ HDD
SATA 6Gb/s
Formatted Capacity2
Rotational Speed
5400 RPM
Cache / Data Buffer
Manufacturer Model Number


Height (max)
9.5mm (0.374″)
Width (max)
69.85mm (2.75″)
Length (max)
100.2mm (3.94″)
Weight (typical)
0.11kg (0.24 lbs.)
Guaranteed Sectors


Transfer Rate (Max)
6.0 Gb/s
Average Latency


Read Power
1.4 Watts
Write Power
1.4 Watts
Idle Mode
0.59 Watts
Standby Mode
0.18 Watts
Sleep Mode
0.18 Watts

Environmental (Operating)

Ambient Temperature (°F)
32°F to 140°F
Ambient Temperature (°C)
0°C to 60°C
-1,000 feet to 10,000 feet

Environmental (Non-Operating)

Ambient Temperature (°F)
0°F to 149°F
Ambient Temperature (°C)
-40°C to 65°C
Relative Humidity (non-condensing)
5% to 95%
-1,000 feet to 40,000 feet


Idle (Typical)
2.4 bels
Seek (Typical)
2.5 bels
  1. 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.
  2. In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.
  • 1.0TB* Western Digital Scorpio Blue Hard Disk Drive**

  • *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.

    **OWC reserves the right to replace or upgrade to equivalent or better components.

Drive Interface

  • SATA (Serial ATA) Revision 3.0

Drive Cache Size

  • 8 Megabyte (8,192k)

Drive Rotation Speed

  • 5400RPM

Port/Interface Bootability

  • Thunderbolt: Supported on Macs meeting minimum requirements.

Max Data Transfer Rate

  • Thunderbolt: 10Gb/s


System Requirements

  • Macintosh: running OS X v10.6.8 or later with an available Thunderbolt port
  • PC: running Windows 7 SP1, Windows 8.x or later with an available Thunderbolt port (Windows drivers required)

Power Supply

  • Bus Power via Thunderbolt

External Case Dimensions

  • 3.5" (W) x 5.5" (D) x 1" (H)
  • 88.9mm x 139.7mm x 25.4mm

Total Shipping Weight

  • 0.75lbs. (0.34kg)

Software Included

User Guide

Operating Environment:


  • (operating) 5°C - 42°C (41°F - 107°F)
  • (non-operating) -40°C - 65°C (-40°F - 149°F)

Relative Humidity

  • (operating) 8% - 90% RH (Non-condensing)
  • (non-operating) 5% - 95% RH (Non-condensing)


  • (operating) 70G 2mS;
  • (non-operating) 175G 2mS


  • (operating) 1.0G (5 - 300Hz)
  • (non-operating) 5.0G (5 - 500Hz)


  • More than 300,000 power-on hours

Load/Unload Cycles

  • 600,000


3 Year OWC Solution Limited Warranty

The best warranty is one you never have to use - but should the need occur - we're proud to provide a superior level of support and service coverage to our customers. OWC and NewerTech storage solutions come fully backed by an Industry-leading 48-hour turnaround time which includes complimentary Level 1 data recovery for the first year, plus additional data recovery options available throughout the warranty period, for complete peace of mind ownership confidence.

View more information about the 3 Year OWC Solution Limited Warranty

Note: Do not disassemble or otherwise open your OWC solution prior to the conclusion of 3 Year OWC Solution Limited Warranty's period. Doing so will void the remainder of the 3 Year OWC Solution Limited Warranty.

Manufacturer provided specifications for Other World Computing p/n MOTGTBH5T1.0 UPC#: 812437020007


Prosoft Macworld 4.5 miceProsoft
Prosoft Engineering® Data Backup 3 for OS X v10.2.8 or later
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A $59.00 Value! View detailed software info, or click here to purchase softwareseparately from solution
NovaStor NovaBACKUP® Solution for Windows®
NovaBACKUP has been helping millions of users recover from data loss and disasters for over 18 years. Feature rich, NovaBACKUP provides a powerful backup solution. Built-in support for hundreds of the most popular storage devices and a step-by-step backup and restore wizard makes NovaBACKUP extremely easy to use. Requires Windows 2000 or later.
A $49.95 Value! View detailed software info
Intech SpeedTools Utilities
Intech® SpeedTools Utilities™
Intech SpeedTools consists of a suite of utilities managed by an application which controls the launching, documentation and version control of each individual component utility, such as Disk Defrag and QuickBack. An easy-to-use installation and removal application is provided to make installation a snap, yet powerful enough to allow you to customize which utility component set you would like to create.
An $89.95 Value! View detailed software info, or click here to purchase software separately from solution


Click any of the benchmarks below to view the results.

Customer Ratings

Write a Review 5 / 5 3 out of 3 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous Location: Ohio Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 The best backup I've ever had April 7, 2015 Virtually silent operation. Speed with Thunderbolt port is incredible. Now power cord or brick. I can take all of my work in progress as well as 5 years of archives on the road with me.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Falmouth, Cornwall, UNITED KINGDOM Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Thunderbolt HDD February 5, 2015 Only one of my 4 MacBook Pros, a portable 13" i7 model, has a Thunderbolt port and I purchased this Thunderbolt hard disc drive for this particular MBP. I have used this drive relatively few times, always for backup, because I don't often use my smallest MBP. My main MBP is a 17" 2006 model, used daily and its backup HDDs are USB 2.0 and Firewire 400/800. However, on those occasions where I have used the Thunderbolt HDD, it is by far the fastest drive in my collection, attaining speeds close to the theoretical maximum for the Thunderbolt interface. It is surprisingly quiet too.

All the cables and accessories I needed were included in the deal and the asking price, even when import duties were taken into account, was lower than that in the country where I live, the UK.

What I mostly remember about this order was I placed it late on the 22nd December 2014 and it was delivered on the morning of the 24th December, just in time for Christmas, thanks mainly to FedEx but not forgetting OWC which must have processed my order immediately.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Fort Walton Beachj Age: 55-65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Great product. October 17, 2014 I have used these for many years. They work flawlessly. No one gives the service and support like OWC. Thanks.

I would recommend this item to a friend!

OWC 1.0TB On-The-Go® Pro Mfr P/N: MOTGTBH5T1.0 OWC SKU: OWCMOTGTBH5T1.0 Thunderbolt Storage Solution 60 Day OWC Limited Warranty
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