Hi
Where do you download your music from?
What format do you save your music in?
I probably do it differently than you, but I save all my music in Mp3 format.
I convert all the files, I.e. music from iTunes as soon as I get it.
Once converted I can just handle it as files, just copy them to a disk in file manager.
I save all the masters in several places so that they are backed up in their original formats.
I have one music cd that has 175 pieces of music on it, it can play for over 10 hours.
Everything I have will play them, my DVD player all my computers my iPad Kindle, even my car audio systems.
Check out Sound Taxi, I'm pretty sure that it will convert pretty much any kind of sound file.
Though even iTunes has a built in utility to convert their downloaded files to Mp3 now.
I've never checked but one DVD would hold a whole lot of music files.
If you are saying that your computer won't write anything to a CD or DVD then it will probably work after upgrading.
If it doesn't then something is wrong with your computer and you might need to replace the drive.
Mike
And to answer your original question I don't know any reason that Windows 10 wouldn't write your files to disk in the normal way.