It is working good and is enhanced in VISTA. In XP and 7, is having just the problem you pointed. This is All.
It can not be formated thou XP or 7. It is auto rebuilding as you inserted in Vista PC.
If you would like to format it, in XP, you have to download by searching the HPusbformat tool : SP27608.exe, install it, and go through its menu, to format the 128gb in FAT32. I use it and work well. I move the 128gr from to one xp to another 7 or vista, it should go back to the firs same problem loosing data or hosting its data.
Still is having problem data traveler 200 ask kingston for more, if she answer, please informed me.