Wd terabyte drive works for mac not windows

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Does anyone have any suggestion what I can do?

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I've also tried to mount it via USB, but again, my system sees the drive, but won't mount it. My mac sees the drive, it just won't mount. I connect it via firewire to my MacBook Pro running OS 10.13 High Sierra.

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I have a 1 TB WD external HD that won't mount.