the back up is the software that allows u to back up your computer, u can either opt for it or just ignore and carry on using it as a hard disk. try formating the hard disk before use if you don't want the back up software.
I just got a 500 GB WD my passport essential. I plugged it in and found that it wasn't what I expected. It turned out to be a back-up and not a hard drive. Is there a way to make it act like a regular internal hard drive, you know, drag and drop or just put music or files on it? I guess this isn't very clear, but I would like help anyways. Thanks.