I recently just swapped out the 320GB hard drive that was in my external WD Passport with my 200GB MBP hard drive, and I cloned the disk that was originally in there so everything would be exactly the same. Well, it seems like it's the same, everything is running perfectly, but I noticed something in Disk Utility. When I look at the actual hard drive's options, it says it's formatted in FAT, but when I click the actual partition below it, it says it's Mac OS Extended. Which one do I believe? I really would like to know this, since I don't think it's very safe to run my main hard drive when it's formatted in FAT. Oh, and if I click "Get Info" on the actual hard drive in finder, it says it's Mac OS Extended. Attached is a picture of what I'm talking about, since it was kinda hard to explain.