Hai i have transcand stor get 320GB hard disk. my propblem my computer detect the hard disk but when i try to open that it asks "do you want format it?" what shoud i do?.

If the computer is prompting that the drive needs to be formatted, this means either the drive has become currupt (not likely) or that the drive hasn't been formatted or is an unrecognised format

if the hard drive was formatted on a Mac or Linux machine without choose Fat32 format, the drive will be prompted to be formatted under a windows machine

if there is no information on that drive, i'd suggest just formatting it

remember formatting a hard drive removes all information off that hard drive.