Hi everyone. I ran into problems while trying to restore my system from a back up I created on my external hard drive when I had Snow leopard installed. My hard drive died and I got a new one. Put it in. I could not find the CD with Snow Leopard I bought so I installed 10.4 from the CD that originally came with my Mac. However I have my external drive that I used to back up my system when it was working through Time Machine. I connected this drive and tried to restore using disk utility but got an error saying "Unable to access device. Make sure the device is connected and try again". The device is my external drive that IS connected. However disk utility has problems with it. I also tried to view my backed files on it and could not do that as I was getting an error message. What could be the problem? I would greatly appreciate any help. Thank you.