Can't link mp3 file to iTunes library
Usually, when I want to add new songs to my iTunes library, I download the mp3 files and then drag and drop them from my downloads file onto the iTunes library. The blue rectangle pops up with the word link, I let go and it always works.
But now, for some reason, most of the mp3 files I'm dragging and dropping aren't linking even after the blue rectangle pops up. And a few are, but they have the words "not available" next to the title of the file. The song plays in the Groove app when I click on it so it can't be the mp3 file itself that has a bug in it.
I've tried looking for answers, restarted my laptop, checked for updates, tried linking the files via different ways, but they always yield the same results. Does anyone have any idea why this is happening now and how to make it work?
Windows, Windows 10