What does Temporary Files mean?
During the burning process, our software needs some free space on your hard drive to save the temp contents before they are burned into DVD. After the burning is done, all the temp contents will be deleted automatically by our program. The notice you mentioned is just to inform you that the current folder you select for temp file is not empty. There are files or sub-directories in it. If you confirm the message our program shows, the files and sub-directories in this folder will be deleted. Please be sure that none of them will not be used until you click ‘Yes’.