I have a new 2TB iomega hard drive. When I put it on my mac for the first time it appeared but i couldn't put my files on it, so i went to disc utility and reformatted the hard drive to work for a mac. This time I put my files on it and I wanted to make sure they were really there, so i ejected the hard drive removed it from my mac and turned the power off. I turned the power on again and plugged it in again but this time my drive didn't show up, not in the desktop, not in the side panel and not even in disk utility. So please help what should I do?