moving source files

Hey there, 

I have a music folder of about 80 GB. About 30 GB of this music is in my rekordbox database, the rest is not. Is there a way to move only the linked files to a new directory, so only the songs that I have in rekordbox?

If I search for relocating files I only find ways to reconnect the database to the source files, and not for ways to move or copy the source files to another location. Your help is greatly appreciated!

Roger Out