Used songs = tracks referenced by export-ready collections. You can also manually check additional albums or tracks below to force-include them. Save triggers the same export flow as the sidebar's Export All — downloads the backup JSON and prompts you to run the save-script.

Curated mood categories pull songs across albums. The order of categories here is the pill order in the picker; the order of songs inside a category is its playback order. Save writes to the store — export and run the save-script to persist to data/music-categories.json.