I have a Lacie Rugged External Portable Hard Drive - 160GB - that is about 8 years old. It can be powered via usb or firewire 400/800. When I plug it into an external source, I can hear the drive spin, though admittedly by it's sound, it doesn't seem to spin as fast it did in the past. What do I need to do to restore power and see my data? Would it be possible to switch drive enclosures? I am confused on how to trouble shoot as I have tried new wires to see if it was an outside connectivity problem but the drive still didn't show up on my system. I am working with a 2009 Macbook Pro that is running 10.7.5