Since installing Maverick my MacBook Air is no longer showing my external Hard drive, which I connect via USB.

I know the external hard drive is working and the USB port works also.
I have seen lots of complicated answers on here but nothing I can understand.
Any help appriciated.
Lesley

The WD hard drive itself is probably fine, the enclosure has likely failed. WD externals are notorius for cheap enclosures failing. Try a different cable first. You can take the drive out and install it in a better enclosure, like one from OWC.
http://eshop.macsales.com/

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