Portable External Hard-drive is not recognised on Macbook Pro after latest update

Recently my Seagate Portable hard-drive is no longer recognised in Finder, disk utility or the system profile. It no longer sufficiently powers the device as no light appears but the external hard-drive does make a noise. The device still works with other macs.
So far I have tried turning it off and on and have consulted my local apple store with no luck.

Do other peripherals work when connected to the MBP?
Try a NVRAM reset:
http://support.apple.com/en-us/HT204063
Ciao.

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My external hard drive is not recognised on my mac book pro

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http://store.apple.com/us/browse/home/shop_mac/mac_accessories/storage
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Portable External Hard-drive is not recognised on Macbook Pro after latest update

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