^Yeah, Got it now, thanx to eBay Customer Support Team.
Actually my dad purchased the iPod using his credit card (I don't have one). He made the transaction on his office PC and he didn't enter the code of the HDD in the required field and left it blank. I was very disappointed with that and shooted an email to the eBay Customer Support Team requesting for the HDD. They accepted my request and sent me the HDD now..