Detecting Drives

I just bought my 1tb My Book for Mac and got it set up.  I also have a 1 tb Iomega hard drive that I would like to back up, but the My Book software does not detect it when they are both hooked up.  How do I back up all the files on my Iomega to the My Book?

Smartware for Mac will only recognize the main hard. You can use drag and drop or copy and paste.