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  1. #1

    Member Since
    Jul 15, 2010
    No longer recognizing external hard drive
    My iMac has stopped recognizing my Western Digital external hard drive. I did not put anything on the drive right before it stopped showing up. It connects using USB along with it's own power supply. I have tried all of my USB ports and none of them recognized the hard drive.

    I opened Disk Utility and it shows up. It has two items relating to the external hard drive. The first says 232.9GB WDJB External Media and the second indented below it says disk3s1. Both items have the Verify Disk and Repair Disk options grayed out (along with the Verify Disk Permissions and Repair Disk Permissioners). It was already formatted with FAT 32. I don't have access to a Windows machine or another Mac machine to see if it is just the hard drive.

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    Will Disk Utility allow it to be erased and formatted? Don't actually do it, just see if it can be. If DU won't erase and format it, the drive probably has failed.

    If you have valuable data on the drive that you need, it may be possible to extract it with special software. Data Rescue 3 is very good at that and can be downloaded as a trial version to test with before buying.


  3. #3

    Member Since
    Jul 15, 2010
    Both Erase and Reformat are available.

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