Just remember, if the hard drive is asleep, the Sonos speaker can’t play any of the music stored on it. There is absolutely nothing wrong with choosing to have to spin up the hard drive when you want to listen to music, you’ll just need to be aware if it can ‘sleep’ while you’re listening, and that you need to turn it on before hand each time. My personal experience has been, in the past, that ‘wake on LAN access’ functions weren’t fast enough, but I’ve not tried that in years, so it might be different these days. And I now store my music on an NAS anyway, so I can let the Mac’s HD sleep.