Ok I ordered a external hdd case which is firewire and 4 pin and a new hitachi travelstar 40 gb hard drive with intentions to copy my hard drive for a backup.When I put my drive in and plug it in with firewire I can hear the disc spinning and the blue light comes on but nothing happens not anything.The way the 4 pin works is it has a 4 pin on one end at two usb's on the other end and when I plug the 4 pin into the hdd case and both usb into my computer nothing happens I can plug the firewire in when its plugged up like this and nothing happens either.When I plug one of the usb into my iphone charging brick and the other usb into my computer a message pops up saying the disk inserted is not readable by this computer but I can press initialize and it opens in disc utility but when I try to parition or erase it an error message pops up saying wrong input/output but when I plug in the firewire when its in disc utility it dissappears.Anyone got any Ideas that I could try anything would be greatly appreciated!