Thanks for the advice, but I am still having trouble. My original plan was to switch the drive letters using the search & replace feature. I tried this before I posted and it failed. Even with the correct link reflected in the filename, it cannot locate the song. I am getting recommendations to use this process, but it just does not work. I would not continue to recommend it to others.
I had originally tried it in a playlist. Today, I tried it the master list of songs. Here, every song is currently duplicated. When I searched and replaced on the filename, it changed the drive letter, but added a "(1)" at the end. Hense, it could not find the song. My orignal plan to delete all files from the old hard drive is the best option for the master list of songs.
But, I still cannot get the playlists to recognize the songs with the correct drive letter & path. Is it time to rebuild all my playlists?