If you ever had any need of fixing your music folder with the correct tags (genre, title, album, etc). Do not trust Picard, which is an application which is an open source music tagger provided by MusicBrainz. You are going to regret the moment you use it. I have aroudn 80-90GB of music, that isn't really a lot however I wanted to improve the tags on my mp3/flac/ogg/etc files so I said, "hey, I need an application that do this". That's when I found out about Picard, which do exactly what I want. Sadly, it came to me that once Picard did its work many of the albums I had had the wrong title, the wrong time, the wrong artist. Be very wary of Picard, if you are going to use it, on a small library go for it but for a big one? Think thrice as it might end up screwing your library more than it is!