I bought a WD Passport Studio 500GB FW800 this morning from Best Buy. I wanted a firewire drive because I am going to get an SSD soon and want to keep files on a fast external drive (photos, iTunes library, etc.) The first drive I got was having issues on the firewire side. I was transferring files and the transfer stopped for about 5 minutes and then the drive ejected itself. It was doing this consistently on FW, but not on USB. After hours of messing with it, I figured I had a defective drive, so I took it back and exchanged it for another. And of course, its doing the same thing. I'm going to take this drive back, but I was wondering if its the drive or the FW800 on my MBP? USB works just fine on the drive. This is my first time using FW of any kind and so I don't know if its an issue with FW drives or not. All I want is a FW800 drive that works, especially when it costs $170.