I have an iomega 500gb external hard drive that just recently decided to stop working with my Macbook. It has worked flawlessly for almost a year but last week it decided to stop. It will still turn on whenever plugged in, light on the back will flash and it is not recognized. I can find it in disk utility but it doesn't let me do anything with it. I have tried all the ports with different connections, usb, firewire (both firewire ports) to no avail. Looking for help as there is a lot of important data on here. Thanks in advance for any help.