I get the feeling that my macbook (2.2 ghz first santa rosa release) hates other hard drives. I've never really had a problem with them up until this past month. I used to have a 250 gig WD and it worked fine. Problem is I DJ with ableton live from my computer and all my music must be in 320 kbps mp2 or 24-32 bit wav format. About 2 months ago I bought a Freeagent Go 500gb portable hard drive. Then after about a month's use (I can't remember what version of leopard I was in or what other changes I made on my mac) it quit working. Basically it wouldn't mount. It would always show up in system profiler, and most of the time I could see it in disk utility. I would ran the repair several times. The only time it would show up would be when I had it plugged in for more than 10 minutes, but a message would say... "The disk "Coday" was not repairable by this computer. It is being made available to you with limited functionality. You must back up your data and reformat the disk as soon as possible" So basically I waited for it to load, put my itunes library, copies of applications I had paid for to register, and other important items on it and reformatted my macbook's hd then re-installed leopard in case it was a firmware problem. After the install I waited 10 more minutes for the ext. hd to show up and copied all the files off of it, and then reformatted the hd. None of this helped so finally I decided this was an issue with low bus power. But for some reason a particular USB cord (not the one that came with it) worked with it, and everything was fine. But anyways, for christmas I got an external Freeagent go Xtreme 1.5th HD. Same problem, except this time I'm using the firewire port and the drive has an a/c power source. After googling, I've came across numerous people having the same problem with different brand hd's. So is there a known issue with OSX (I'm running 10.5.5) and external Hard Drives? I'm looking for solid answers. Most of what I can find is "well it might be this... or maybe you could try this?" So are there any concrete facts about this issue? And what about solutions? Thanks, and sorry about the long post.