I have recently upgraded the HDD of my HP desktop. OS is Windows XP SP2. Before upgrading, I have copied the files into a external usb 2.0 drive using Ghost 9.0. Due to some problem I caused, may be related to MBR, I cannot access the usb 2.0 drive with windows explorer even though device managers sees it. Pls help. Urgent! All of my critical data are on the 2.0 usb drive.