While it may be so obvious to those in the know that they don’t think to write it down, I struggled mightily to synchronize my music selection on my two computers. I had some recoreded on the desktop and others on the laptop. I sure didn’t want to re-do the recording time if I didn’t need to.
In Linux Mint, there is a default folder called “Music”. That is where Banshee keeps its songs, albums, graphics, etc. Copy that to the other computer. THEN, go to the Banshee Tools tab and Rescan the music library.