Hi, I bought a new 500 Giga WD MyBook USB external HD. Since it's sold formatted for Mac, I had to repartition and reformat it for my WinXP Pro (SP3) system. I can't explain what exactly happeded, but eventually I found my system in a very queer state: 1. The new HD got the letter drive of one of my internal hard drives (D. In the Computer Management it appears with a red bar and a "Healthy" description 2. One of my old hard drives shows as an "Unallocated" drive, with a black bar and no letter assigned. Looks like I've lost all my data on this unallocated drive! Now, I would like to recover these data and hope to do it with the assistance of Stellar Phoenix Windows Data Recovery application. Should I first partition this drive? Will this repartitioning let me reassign a letter to the drive enabling data recovery or will it lead to a total loss of the data? How do I get out of this maze?