Upon connecting my WD external hard drive i was asked to ignore, eject or initialize but when i initialized disk utility won't let me click on verify or repair disk.what to do pls?

Hi all,
thanks for your time.
Have tried testing cables both usb and firewire and they work fine with other external hard drives.
1.Have also done finder>preferences>unchecked then checked 'external hd'.then when that didnt work, tried shutting down before repeating but nothing.
2.also saw instructions for PRAM reset and followed that too by pressing option+command+P+R during start-up chime but still nothing.
hope you can help me out!
thanks,
Claudette

How was the disk originally initialized? What system was it on before you hook it up to your Mac? Are there any files on it from earlier use?
The message you are getting is telling you that system doesn't see the isk as a Mac volume and you need to initialize it before you can use it.

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Upon connecting my WD external hard drive i was asked to ignore, eject or initialize but when i initialized disk utility won't let me click on verify or repair disk.what to do pls?

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