The thing is that when i want to buy a pen drive. I go to shopping sites and i find a san disk cruzer blade at Homeshop18.com at very high discount. and i place my order on Homeshop18.com. After that i receive my pen drive, after some days i was running the pen drive on my computer and after some time it stop working and a message is to be shown when i format the pen drive i.e The disk is write protected. now they are not exchanging the pen drive whereas they give me 5 year manufacturer warranty and guarrantee.so please help me in solving my problem.