Official comment
@alper > This is already available. I keep my collection and master database on an external drive and export everything to that same drive for use with CDJs / XDJs.
You currently do need to "export" everything to the external drive (playlists / songs), even if it is the source, because that builds the export database which the players read. This process does not create duplicate files, so no worries about space there, and it only takes a few seconds.
