Hi. I recently did a custom install of Windows 7 Ultimate. I backed up all of my files (music, movies, documents etc) onto my 500GB FreeAgent External Hard Drive (I was previously using XP Proffessional) However, now the external hard drive won't show up on My Computer. It can be seen in Device Manager, as well as Devices and Printers. How do I access my external without losing any of the files that are currently on it?