Unable to remove phantom iTunes storage under the new mac storage management tool The storage tool, opened from About This Mac, shows there is 30.15GB of iTunes data. I went into the iTunes root folder and removed all the music and podcasts. The 30.15GB remains. I have tried restarting the mac. Is this a bug or is there somewhere else I should look to delete this 30.15GB of data?
Be patient. It takes some time for the Mac to rebuild the index that determines the (exact) size of each section.

Keep a mobile Mac connected to a power source if you want to accelerate the process.

You could also rebuild the spotlight cache, but it's barely worth it just to update the view.