I have a Western Digital 1TB USB Mybook drive. Formatted from the factory as fat32. When the PC boots, XP always flags it for chkdsk, chkdsk runs but does not find/fix the problem. The drive runs fine. WD Utility detailed scan shows 100% healthy, as does HD Health. (12 hour scans) But when I went to run an XP conversion to NTFS, it ran a while then said the drive had errors and could not be converted. I disabled the chkdsk boot time scan in the registry but that is not a good solution. Obviously there must be some problem. What utility do you recommend to fix the problem? I'm thinking this is a fat32 integrity problem, not a physical problem with the disk. Thanks!