Computer does not boot with My Book connected


Windows PC does not boot past the BIOS when the My Book is connected to it.



There are two reasons that can cause the Windows PC to not boot past the BIOS when the My Book is connected to it.

1. My Book is formatted with ExFAT by default and is incompatible with some computers.
2. When Legacy USB Support and Boot from USB Drive is the first option configured in the BIOS.


If the My Book is used across Windows and macOS platforms, keep the exFAT format and disable the USB Legacy Support in the BIOS.

If the My Book will be used on Windows systems only, reformat the My Book to NTFS. BIOS settings should not need to be changed.

Reformat the My Book from exFAT to NTFS

For assistance partitioning and formatting a WD drive on Windows and macOS, please see Answer ID 3865: How to Partition and Format a WD Drive on Windows and macOS

STOP Critical: The instructions are designed to help repartition and format a hard drive. This process is Data Destructive and cannot be undone. Once the process begins, ALL THE DATA ON THE DRIVE WILL BE REMOVED!

Disable Legacy USB Support

  • Disable Legacy USB Support in the system BIOS
  • Ensure Boot from USB Drive is not the first boot option in the BIOS

IMPORTANT Important: Do not disable Legacy USB Support if your keyboard and mouse require this feature. PS/2 Keyboard and mouse do not require this feature.

  1. Please refer to your computer's documentation for information about how to obtain the device settings from your computer's BIOS

  2. Boot (or restart) the PC

  3. When the first screen appears, look for a message that indicates which key you need to press in order to access the BIOS The most popular BIOS options are:
    Options and screens may vary depending on the BIOS.

    • F1, F2, or F3 key
    • Esc key
    • Delete key

  4. After entering the BIOS

    • Locate and Disable Legacy USB Support


    • Locate and change from Boot order to prevent booting from USB Drive as the first option


  5. Save the changes per your computer's documentation, and reboot the PC

For more information on accessing BIOS and boot issues with USB drives attached, please see the following articles:

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