I have this Seagate 3TB HD working for a few months until yesterday. I originally formatted the drive using Seagate DiscWizard on Windows 7 at office. It works fine on my office PC and home PC (XP 64-bit). It ran fine until and stopped working after I reboot the PC yesterday. Then, it was recognized only as Removable Disk. I thought it may be my PC so I tried it again on my office PC and it's recognized as removable and not be able to access anything at all. Using Seagate DiscWizard, it just stay a detecting devices stage and never be able to recognize it.