Hi there, I bought my first mac (Aluminum Macbook 2.0GHz) a few days ago. So far so good. The learning curve wasn't as steep as imagined. There's an error I haven't been able to resolve. I transferred all my files to my external hard drive. A 500GB Western Digital HD. When I try to delete files from the external HD I first get this message: "The item "whateveri'mtryingto.delete" will be deleted immediately Are you sure you want to continue?" I click continue and I get this: "Sorry, the operation could not be completed because an unexpected error occurred. (Error code -61)" Your help will be much appreciated.