I have a 500Gb Lacie External HDD, connected to my Mac via Firewire 800. Just recently, it has been causing my Mac to have some major slow down, and frequently causes applications to freeze up (forcing me to 'force quit' them). I know the HDD is the culprit because when I disconnect the HDD my Mac goes back to it's speedy, 4Gb RAM empowered self. I've tried formatting the HDD and reconnecting it, but it's still causing me some issues. Does anyone have any suggestions to fix this problem, or is it time to buy a new one?