1TB Passport Not Appearing in Finder/Disk Utility

WD External Drives External Drives for Mac
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  1. Passport IS NOT appearing in Finder OR Disk Utility
  2. Passport IS detected by WD disk utilities application
  3. Passport IS detected by USB device tree in hardware/system report/‘about this mac’

LED light IS blinking and device motor running. Kept in grit/water-resistant case since day 1 and no significant impacts, temperature changes, faults until now.

On Macbook Pro running OS High Sierra 10.13 and I have tried plugging it into other Macs/Macbooks, no success.

Any suggestions? Please?

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Hi stoms,

You can have a look at this KBA,