im gonna say it again remove those folders like music 1 and 2 and then copy the itunes folder inside your hdd to your mac and then rename the itunes library like the picture i sent to music library then open the music app(like the old itunes ) while youre holding option and then select choose library after that go inside the itunes backup and select the file (itunes library.itl that you renamed it to music library ) and after that you need to select a new folder as youre library you can select the old one completely
but one thing i did there i removed the music library that it was already inside the music folder and i put the library file there after i chose my music app library like the picture and inside the old itunes folder i still have that file when i renamed it
i really hope this help this is all i did