man this is funny.
How about you just power your USB hub?
USB = 5v
Car = 12v
Go to Jaycar or tandy or whatever say you want a 5v voltage regulator. $3 later you have a powerd USB hub.
Same here... even when powering the hub the HD doesn't work. Looks like for WD Passport drives, you may need their special USB cable that also has a power input: http://www.wdc.com/en/products/acces...asp?ProdID=170
Assuming I don't break anything, I think will be happier with the 120GB HD I'm replacing the stock HD with. I just wish that on the mp3car.com store page, they had made it clear that the USB hub would not work for USB hard drives - that way I could have it all working a lot faster than having to wait until sometime next week for the replacement drive to arrive (since I would have ordered it long ago).
It doesn't work even when the HD is the only device on the hub.
In fact I had to replace the hub anyway because the one sold online here is too flaky - when I have bluetooth + wifi + keyboard + mouse all on the hub, they all stop working in less than a minute (but sometimes last up to half an hour). I grabbed another USB 2.0 hub and it works fine (but still not for the HD of course).
Nothing shows up in the Removable Drives section other than "iPod" (which I don't have) and the DVD drive. I have scrolled all the way to the bottom.
Also when I choose to browse my hard drive, it only shows what is in the "E:\My Music\_Indexed" directory (so just the 3 default songs that come with the G4). I see no way to navigate to a different directory or to a different hard drive.