When I created my first backup this weekend using Acronis 11 (8027) the system created 12 separate files. I had the Automatic option selected. But after reading the note below from the help screen I now know that it is my external hard disk (My Book Essential). My question is how do I ,or can I, change my external disk drive to allow the estimated file size so tat I only create one file?? If the storage disk has enough space, but its file system does not allow the estimated file size, Acronis True Image Home will automatically split the image into several files.