I have recently updated my OS from Leopard to Snow Leopard but now my external hard drive and even my iPhone are not recognized by my Macbook Pro!  Anyone have a suggestion??

I have recently updated my OS from Leopard to Snow Leopard but now my external hard drive and even my iPhone are not recognized by my Macbook Pro!  Anyone have a suggestion??

Zap the PRAM and Reset the SMC, then try again. If the problem remains, update to 10.6.8 and repeat.

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