Material in library not appearin in itunes library folder on hard drive
I have a problem that is opposite to what some people have mentioned. I recently lost my system hard drive on my PC (windows 10) and when I purchased a new disk drive and reinstalled windows, much of the music on my itunes library and all my play lists were gone, including many of the CDs I'd added from hand and some I'd purchased some time ago. Clearly I hadn't backed it up recently enough. Sigh. But that's not the issue itself.
After painstakingly reinstalling everything I'd purchased from itunes and using my DVD player to reinstall my own CDs and recreating my play list by hand, everything looks good when I opened itunes. I want to make sure I don't lose the library again, so I went to my C drive to transfer my itunes library to an external drive for safekeeping. But when I open the music library under microsoft explorer (or whatever it is called), many of the albums and songs in my library are still not listed, even though I can see them and play them from itunes. When I went into the C drive directly (path: This PC>Local Disc (C:)>Users>Myname>Music>itunes>itunes Media>Music) I had the same issue--the songs and albums I'd added over the past two days are not reflected in the list of music there.
So I want to get the itunes library folder in my music folder on my C drive to reflect what is actually in itunes (when I open the program) so I can back it up.
How can I do this? Thanks for any insights!
Windows, Windows 6