I just picked up this Buffalo external 250gig HD. It supports USB 1.1 and 2 as well as OSX. When I plug it into my 1ghz. TiBook (running 10.2.8) it isn't recognized. However, I plugged it into my G4 Mac Mini (10.3.9) and it pops up on the desktop as it should. Why is it not recognized by the powerbook? Does the plug and play work differently with older machines? Thanks in advance for any advice.