Is my MBP too old for new externals?

I have the 1.83 GHz Intel Core Duo, 2GB DDR2 SDRAM, model of MBP, I am running Leopard. I want to buy the WD Passport 120GB. It is powered through the USB port. All the posts in the forum about this device working properly are coming from people who have the core 2 duo & newer/faster models of the MBP. Will my model be able to power this device through just one of the USB ports? I don't want to buy it, plug it in & have it fry my laptop. Please let me know. A definite answer would be great. I can't rely too much on speculation, unless you really know your stuff. Thank you very much in advanced.

Richard
The usb ports are rated at 500mA for your model and later and it seems that Apple has kept this current draw strictly to 500 rather than a few mA over. Provided the drive does not need the full 500mA it should work. Having said that I know that many have had problems with usb drives drawing more than allowed in MBP's. This is likely to be because they are specced too close to the 500mA or that the ports are delivering a few mA less. The other point which has made a difference for some who have already spent their money is that quite often a device will work from one usb port but not another even though the ports are supposedly the same spec.
I can't comment on the specific drive you're looking at. Can I suggest that you ask the dealer whether you can get a full refund if the drive draws more current than the MBP provides.
The age of your MBP is not an issue here. The latest MBP's are no different in this regard.
Neville
The consensus of opinion is to buy external Firewire drives if possible. These ports apparently provide more power for the hub-powered hardware.

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