Thank you so much for the response! I am very glad that I found this forum...it is always a pleasure to get answers to questions and then at some point, be able to answer some with my own knowledge!
Here is what I think happened.
I did make my D:\Music the destination folder for "My Music." Then, when I went to go "hide" my original "Music" folder and then "unhide" it, it got renamed to "My Music" as it is now the default music folder for my lappy! I figured this out because I went to "unhide" all within my D drive and my Music folder didn't appear, but several Windows folders did. This meant that all folders were now appearing and that it must have been renamed. It also contains the 10.5 gigs of music that I have.
Thanks again for the information. I have been working through all of those tutorials and they are great!