I finally got fed up with Amazon and read I could upload my personal music library (many original works of my own) to Spotify. I signed up for premium and in SETTINGS - I can find NO option to search my desktop files for LOCAL FILES.
I've spent 1.5 hours trying.
I had Spotify when it originally came out (and liked it) and remember it not being to difficult but this has stumped me.
I also re-downloaded the latest Windows 10 Desktop app from Spotify and reinstalled.
Solved! Go to Solution.