External Hard Drive Isn't showing up.

Today i was moving some files on and off my WD 1T harddrive for about an hour or so when it just stopped reading? I didn't move it at all while it was in use. The name of the hard drive in the side bar just turned a grey colour and froze. It would not eject so i had to pull the cord out. Iv tryed to put it in to 3 different computers (all macs) and still the same issue. All the lights still turn on when i plug it in and i can hear it start up but its just not being picked up on the computer (not showing up in disc utility either). if someone could please help me it would be greatly appreciated. cheers
Louis

Check the settings in the General tab of the Finder's preferences.
(66178)

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Check the settings in the General tab of the Finder's preferences.
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PRAM RESET
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Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
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Hi,
Welcome to the Discussions.
The drive's directory is damaged and as you found Disk Utility isn't equipped to repair it. You need Disk Warrior or Tech Tool Pro.
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If the Disk Utility sees it, you might be able to repair it or recover the data on it with a product such as DiskWarrior or Data Rescue.
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zone-5 wrote:
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I have not been able to figure out how to start a new topic here, but did find this discussion, which fits me fairly close.
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External Hard Drive Isn't showing up.

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