You can also leave the media where it is and keep your iTunes library on the default drive. Just go to Preferences > Advanced and uncheck the two boxes as indicated. iTunes will still catalog the media, but won’t move it to the iTunes Media folder on your default drive. View attachment 58962
I have over 9,000 songs, about 250 television shows and over 450 movies available through iTunes on my Mac Mini for streaming through the house to Apple TVs and iPads. Everything is stored on a network attached drive.