Missing External HD

I used to have an icon for my external drive titled "My Backup" somehow it has disappeared. How do i retrieve it? Any suggestions? Thanks Van

Too little info to make a useful suggestion. Try again with more details, please.

I am assuming it is not showing up on the desktop, right? Goto Finder preferences and check the box which says so
Hope my assumption was right and it helped you....

BTW, as @chas_m said more details always helps...