Hi Simon, I installed a 250 GB HD in my G4 500Mhz. You're right, it doesn't recognize the entire 250, there is a program available that will do it for $25, because supposedly you can't partition it yourself. (that, by the way, is a lot of music!) Kent "A person who won't read has no advantage over one that can't read." - Mark Twain "Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read". -Groucho Marx