I have an iPod Nano I was trying to load up with some favourite tracks from artists I like. The Nano only has 16GB of storage, and I’m using about a third of that space already to manage podcasts. So I’m using the iTunes option to “Convert higher bit rate songs to 128 kbps” AAC to get as many songs on the device as possible.
This worked well for all but three of the tracks in my library where I was presented with the cryptic error message:
iTunes could not copy “Crazy Little Thing Called Love” to the iPod because the file could not be converted