Good evening, I want to realize the following: My music is to be synchronized. Simply, only all the data from the A folder on the hard disk to be synchronized to Folder B. All data that are on B, but not on A, should be deleted. I have about 40 GB of files. If this occurs, a file comparison, the entire story takes about half an hour. The program is really just see if there are any files on B, it is not on A, and delete these files, which are not available on A to B but to copy.