How much hard disk space do I need to burn a disc?
If you’re using the Live File System format, you don’t need to allocate any additional space to burn the disc, since each file is written to the disc as you go. If you are creating a Mastered disc, however, Windows needs to create a complete “image” of the disc before it is burned. This disc image can be as large as the maximum capacity of the disc you are creating—you might need 650 megabytes (MB) on your hard disk to create a CD-R, or 4.7 gigabytes (GB) to create a DVD-R.
