i need to know how to back up internal hard disk to external hard disk. please tell me.
you buy one of those usb 1tb storage units from wd or make your own with a drive and case.
then pick up norton ghost or a drive clone or a good back up software. toss out the wd software.
the good software will have a boot cd or boot usb stick that let you recover all your file in about 10 min if the inside drive failed and is replaced.