damkend

In Ez-Mode Picker (see screenshot attached) there are 6 options and 3 of them mention the term "image file". My questions: 1. What is an image file? 2. What is the purpose of creating an image file? 3. How is an image file different from a regular file/folder? (i.e. write image file to disk vs write files/folders for disk) Additional question: 1. I burned a movie file to DVD+RDL using Windows DVD Maker and when the encoding process was complete the source file was gone, how come?