Hello, I have an iTunes library that I've been collecting and taking care of for, well, almost as long as there's been an iTunes. I've got lots of songs (though not as many as some others might have), and I've got everything very well organized - albums, album art, artist, composer etc. there are no loose "uncategorized" / "unalbumed" etc. songs at all. That's great. But.... When I copy a bunch of individual song files from my Mac to somewhere else, like a smartphone that is not an iPhone, or to my work PC, some songs retain the metadata and some do not - for example Artist or Album name might be missing. [<-- yes I know how to properly copy an entire iTunes library from Mac to PC, that's a separate topic that I am not asking about now.] So I've figured out that for my songs, some of them have the metadata in the file itself, and for others, it is only in the iTunes library file. This could be the problem. So my question is.... is there a way to make "The Truth is in the File" become true, in other words, sync the metadata contained in the Itunes library file into the .mp3 files? For at least the most elementary fields such as Artist, Composer and Album?