How can I merge 2 main music folders with many subfolde

[JohnnyScience]

Ok I have 2 music folders that each have many sub folders (artists)

A lot of these are duplicates, how can I easily merge these two main files so that all of the sub files merge & only copy the new ones?

 

[reghakr]

You have to find out if they are exact duplicates first

Then simply use the copy process it will ask you if you want to overwrite or not