Locate iTunes Music after moving location
I had my iTunes music (along with all other media) on an external drive. I have now upgraded my Macbook Pro so it has a large enough internal drive (SSD) to hold all my files. So I'm moving my library to be on the main drive.
I copied my iTunes music to my internal hard drive's Music folder. (~/Music/iTunes/iTunes Media)
In iTunes' Advanced Preferences, I changed the location of the music library to the new one.
iTunes however finds some of the music in the new location, but not all songs. A finder search indicates that they songs are actually there, but iTunes isn't seeing them. Other than locate them one by one (there are hundreds), how can I get iTunes to see all the songs please?
MacBook Pro (15-inch Mid 2012), macOS Sierra (10.12.4), SSD, Optical Drive swapped for HD