Hi MadameMarta,

If you backed up your computer onto that external hard drive using Time Machine, then you will want to see the information in the following article to help you address this issue:

My Passport for Mac drive find its way back to you if it ever accidentally gets left behind. Reimagined Design The bold, vibrant design of the My Passport for Mac drive is sure to stop you in your tracks. It is portable storage reimagined to complement your own personal style. Easy to Use My Passport for Mac portable storage is ready to use.

You can move, copy, or delete the Backups.backupdb folder on your Time Machine backup disk as you would other folders. You can also delete folders within the Backups.backupdb folder. You can’t delete individual items inside the dated folders.

Important: Do not use Terminal or any app other than the Finder to move, copy, or remove items from the Backups.backupdb folder.

Thanks for using the Apple Support Communities!

Cheers,

Braden

Sep 4, 2014 7:06 AM

Summary: The WD My Passport for Mac is not showing up in Finder nor in Disk Utility? Follow the tutorial in this article to fix the issue and recover lost data from not showing up/not working WD HDD without data loss.West Digital hard drives, such as WD My Passport for Mac, WD Elements, or WD Easystore, are trusted by a large number of users to store the massive amounts of photos, videos, and music files, etc. What's more, they are widely known thanks to their auto backup, password protection, and high reliability compared with other hard drives.However, everything has flaws. At times, the WD My Passport hard drive won't show up when you connect it to your Mac computer, the, or WD hard drive's light is on but not working. Even worse, it may become unreadable on Mac computer. In either way, your important data on this drive will become inaccessible.If the WD My Passport hard drive is not showing up in Finder, Disk Utility or on the desktop after connecting to your Mac, how to find it and make it work?

If you, how to access data? You'll get answers here. As mentioned above, malfunctioned USB port or Mac computer, the broken USB cable and some hardware problems can also make WD My Passport hard drive not showing up. You can do some basic checks to troubleshoot whether this issue is resulted from those factors.1.

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Safely remove the WD My Passport hard drive and reconnect it to the USB port. Try quickly plug and slowly plug, sometimes it just works for no reason.2. Check whether the USB cable or USB port is bad by connecting other hard drives to this USB port or cable and see if that makes a difference.3. Reboot your Mac computer to see if your WD My Passport drive is not showing up in Disk Utility/Finder or not.4. Connect the WD My Passport hard drive to another Mac computer or Windows PC, which will find out if it is the incompatible file system of the drive that makes this WD My Passport hard drive undetectable. How to fix WD My Passport for Mac not showing up on Mac issue?

If the WD My Passport for Mac still does not work or not show up in Finder/Disk Utility after the basic checks, go ahead to try out the solutions as below to make it show up on Mac. Solution 1: Check Finder PreferencesIf your WD My Passport hard drive is not showing up in Finder and desktop, it's possible that the configuration of the Finder Preferences is stopping your WD My Passport drive showing up. IBoysoft Mac Data Recovery is free hard drive data recovery software for Mac that is able to, recover lost data from formatted, inaccessible, corrupted, unmountable, unreadable hard drives, SD cards, memory cards, etc. Apparently, most hard drive not showing up issues are caused by unsafe ejection and sudden power outrage.