OWC Envoy Pro SX

Support Manual

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1.1 System Requirements

Operating System

  • Mac: macOS 10.13 or later
  • PC: Windows 10 or later
  • Other: Linux, iPadOS 13 or later, & ChromeOS (latest version recommended)


  • Mac, PC, or tablet with a Thunderbolt (USB-C) port

Supported Drives

  • NVMe M.2 SSDs w/ 2280 form factor & "M Key" connector type

1.2 Package Contents

1.3 Overview

  1. LED IndicatorPower & Data Activity = Solid Blue / Data Activity = Blinking Blue
  2. Thunderbolt (USB-C) port – connect to a Mac, PC, or tablet with a Thunderbolt (USB-C) port

Getting Started

2.1 Device Setup

This section describes the process of setting up the OWC Envoy Pro SX if purchased with a pre-installed drive.

1. Connect the included Thunderbolt cable into the Thunderbolt (USB-C) port on the back of the OWC Envoy Pro SX. Connect the other end of the cable into a compatible host.

2. The OWC Envoy Pro SX comes formatted as APFS for Mac systems. This allows for a seamless plug-and-play experience between Mac and iPad systems. Connect the OWC Envoy Pro SX to a Mac or iPad and immediately begin using the drive.
NOTE: Windows, ChromeOS, and Android users will need to reformat the Mac formatted OWC device over that operating system to begin use. Please consult the support article "OWC Drive Setup Over Non-Apple Platforms" for instructions regarding reformatting the OWC Envoy Pro SX to work with Windows, ChromeOS, or Android operating systems.
NOTE: Please consult the Support Manual for OWC Drive Guide or Drive Guide Support Guide page for additional information regarding OWC Drive Guide.

2.2 Assembly Steps

This section describes the process of installing a drive into the OWC Envoy Pro SX.
NOTE: Instructional video for installing a drive into the OWC Envoy Pro SX

    1. Place the OWC Envoy Pro SX upside down on a flat static free surface. Remove the (4) case screws which will allow access to the inside of the enclosure.

    2. After the screws are removed, lift the bottom cover off the enclosure.
    NOTE: The bottom cover may be difficult to remove. Additional force can be applied by using a suction cup or placing a driver into one of the screw holes for leverage.

    3. Carefully align the drive at a slight angle into the board connection and slide it forwards until fully seated.

    4. Once the drive is fully seated use the included drive screw to secure the drive.

    5. Place the cover back on the OWC Envoy Pro SX. Secure the cover using the (4) removed case screws form earlier.

    6. Once the case screws have been secured, add the included rubber feet into the notches housing the case screws.

    7. Connect the included Thunderbolt cable into OWC Envoy Pro SX and into a system. The installed drive is ready to be formatted. Please visit go.owc.com/formatting for options.

    Device Management

    3.1 Manually Unmounting Volumes

    • To ensure no data is lost during normal use, always eject or unmount the corresponding volume(s) from the operating system before powering off and disconnecting the device. Unmounting options are provided below.


    • Drag the icon for the device you wish to unmount to the trash can; OR
    • Right-click the device icon on the desktop, then click “Eject”; OR
    • Highlight the device on your Desktop and press Command-E.


    • Windows 10 build 1809 (October 2018) or later:
      • Eject the drive by clicking the ‘Show hidden items’ menu in the Taskbar, then clicking ‘Safely Remove Hardware and Eject Media’, and last select the ‘Eject’ option for this volume.
    • Windows 10 build 1803 and earlier:
      • Go to the System Tray (located in the lower right corner of your screen). Click on the “Eject” icon (a small green arrow over a hardware image).
      • A message will appear, detailing the devices that the “Eject” icon controls, i.e., “Safely remove...” Click on this prompt.
      • You will then see a message that says, “Safe to Remove Hardware.” It is now safe to disconnect the device from the computer.

    3.2 Usage Notes

    • Opening a pre-built (NVMe SSD installed from factory) OWC Envoy Pro SX VOIDS the warranty.

    Support Resources

    4.1 Troubleshooting

    • Verify the Thunderbolt cable is securely connected between the OWC Envoy Pro SX and host.
    • Connect the OWC Envoy Pro SX and host with a different Thunderbolt cable.
    • Connect the OWC Envoy Pro SX to a different host.
    • We are very sorry If issues continue to occur. Please know that OWC support is here to help. Contact information for our support can be found in section 4.4 "Contacting Support". Please have your serial number ready which is located on the bottom of the OWC Envoy Pro SX and printed on the original packaging.

    4.2 Online Resources

    4.3 About Data Backup

    To ensure that your files are protected and to prevent data loss, we strongly suggest that you keep two copies of your data: one copy on your OWC Envoy Pro SX and a second copy on either your internal drive or another storage medium, such as an optical backup, or on another external storage unit. Any data loss or corruption while using the OWC Envoy Pro SX is the sole responsibility of the user, and under no circumstances may OWC, its parents, partners, affiliates, officers, employees, or agents be held liable for loss of the use of data including compensation of any kind or recovery of the data.

    4.4 Contacting Support

    4.5 About This Manual

    The images and descriptions may vary slightly between this manual and the unit shipped. Functions and features may change depending on the firmware version. The latest product details and warranty information can be found on the product web page. OWC’s Limited Warranty is not transferable and

    General Use Precautions

    • To avoid damage, do not expose the device to temperatures outside the following ranges:
      • Environmental (Operating)
        • Temperature (ºF): 41º — 95º
        • Temperature (ºC): 5º — 35º
      • Environmental (Non-Operating)
        • Temperature (ºF): -4º — 140º
        • Temperature (ºC): -20º — 60º
    • Always unplug the device from the electrical outlet if there is a risk of lightning or if it will be unused for an extended period-of-time. Otherwise, there is an increased risk of electrical shock, short-circuiting, or fire.
    • Protect your device from excessive exposure to dust during use or storage. Dust can build up inside the device, increasing the risk of electrical shock, short-circuiting, or fire.

    Safety Precautions

    • Use proper anti-static precautions when handling this device. Failure to do so can increase the risk of electrical shock or short-circuiting.
    • Never expose your device to rain, or use it near water, or in damp wet conditions. Never place objects containing liquids on the device, as they may spill everywhere and into the openings. This will increase the risk of electrical shock, short-circuiting, fire, or personal injury.
    • To avoid any risk of electrical shock, short-circuiting, fire, or dangerous emissions, never insert any metallic object into the device.
    • Please cease use of the device and contact OWC Support if it appears to be malfunctioning.

    Terms & Conditions of Sale


    OWC’s products are subject to OWC’s Terms & Conditions of Sale located at Terms of Sale or other applicable terms. The OWC Envoy Pro SX comes with a 3-Year Limited Warranty when sold with drives, and a 1-Year Limited Warranty when sold without drives. Additional warranty information can be viewed by visiting Hardware Warranties.


    The material in this document is for information purposes only and subject to change without notice. While reasonable efforts have been made in the preparation of this document to assure its accuracy, OWC, its parent, partners, affiliates, officers, employees, and agents assume no liability resulting from errors or omissions in this document, or from the use of the information contained herein. OWC reserves the right to make changes or revisions in the product design or the product manual without reservation and without obligation to notify any person of such revisions and changes.

    FCC Statement

    Warning! Modifications not authorized by the manufacturer may void the user’s authority to operate this device.
    NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference with radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

    • Reorient or relocate the receiving antenna.
    • Increase the separation between the equipment and receiver.
    • Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.

    Copyrights and Trademarks

    © 2023 Other World Computing, Inc. All rights reserved. Envoy, OWC and the OWC logo are trademarks of New Concepts Development Corporation, registered in the U.S. and/or other countries. Mac and macOS are trademarks of Apple Inc., registered in the U.S. and other countries. Thunderbolt and the Thunderbolt logo are trademarks of Intel Corporation in the U.S. and/or other countries. Other marks may be the trademark or registered trademark property of their owners.
    No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of OWC.

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