i have this external usb hard drive (http://www.amazon.com/Western-Digital-Passport-Essential-WDME2500TN/dp/B0012GK3MQ) i got it for almost 2 years now ,so now suddenly it when i tried to plug it in windows started the installation wizard on an usb that i just used yesterday, but here is the confusing part i have checked several internet sites that says that maybe the pendrive is burned down or some thing but my computer DOES detect the usb Hard Drive(i heard the sound that indicates that there has been a usb device connected) but i cant access to it can some one help me? please i NEED the information inse it thnaks