I just got a new seagate 320GB SATA HDD installed into an enclosure which is compatible with eSATA and USB. When I hook up the hard drive into the USB port in my computer, I can hear the noise(ding-dong) but when I when to my computer, there is no drive there. I also check on disk management and it is not there also. Haven't try eSATA yet since I don't have a eSATA adaptor yet. Can anyone help me why my computer is not detecting my external HDD. Thanks.