Video Manual how to export data from one computer to another please!!

ok, i'm not the ideal IT guy to call, but on the other hand in general i do work things out in the end. ITunes f.e. was not the hardest to find out, incl exporting data to other sources.

However, i and as i see a lot of other people have big issues on how to export all the tracks+analyzed functions working on a second device (mac-pc pc-pc pc-mac)

After 4 weeks i understand most functions on both rekordbox and my DDJ-RX controller but exporting/importing the database is a pain..

Can someone please upload a youtube video how it should be done? Its probably a five minute work and will please a lot of us, me for sure! Thanks, Frank