Unable to add songs from external drive to local library

[RyeWollschlaeger]

Platform: Linux Mint 22.1 x86_64 Nuclear version: v0.6.47, stable branch, Flatpak Description of the issue: It seems there is no way to add songs from external drives, like a USB drive, to a local library. Unsure if this is a bug or missing feature. I store all of my FLAC files on my USB drives and it's a shame to not be able to play them from nuclear.