Hi, not sure if there is an existing thread already for this, if there is sorry, but here it goes. My 500 GB external was working fine up until an hour ago, and now my PC won't pick it up/tells me it must be formatted before it can be used... The external HDD has never fallen before and this is the first time such a problem has occured etc. Is there a way to save all of the data on the HDD or to get it to work again on Windows 7?