How to Unmount a Library

[agent_kith]

Said differently, how do I "go back in time" to before I created the current/original Library?

Click on the "/dev/sdb1" button, it will automatically populate the mount, remove the contents in the "Mount point" field, hit save. That will do it. . If you load up your media players now, your existing music will all disappear. And you're on a blank slate, or whatever music is already in /dev/sdb1.

If you delete the /dev/sdb1 mount, you will get back to your current state now.

In other words. let's say you current have these songs in your Snakeoil PC (song1, song2, song3), and your new HDD is blank. When you add /dev/sdb1, you have no songs. But when you delete this mount point, your 3 songs will reappear.