I wrote this post a while back, and a couple of people chimed in saying that they've never been able to mount 2.5" USB external drives on their PB. WHY??? Is this a well documented thing? http://forums.macrumors.com/showthread.php?t=268754 I just tried a Western Digital Passport today because I was convinced that my previous problems were caused by the dodgy cases I had been using, but no, the light blinks to show that there is some kind of connection, but the drive never mounts. The most likely explanation is that there is not enough juice to power the drive (WD Passport is USB powered) Is this the case with all PB's? Ibooks too? How about the Intel laptops? I suppose one solution would be to use a Y cable, but how does that work on a PB seeing that the ports are on opposite sides, if it works at all? Thanks for any insight.