Its by no means a show stopping issue at all, but its just a matter of preference that I don't want my external HD to keep falling asleep after 5/10 mins of inactivity. It means that every time I try to search for files or open certain applications, theres a big delay while the HD wakes up again. Plus I don't want to wear my HD out with the constant spinning up and down. I've tried turning off the "put hard disk(s) to sleep when inactive" option in System preferences but its had no effect. There isn't no switch or anything on the HD itself to toggle sleep mode. So I'm at a loss as to what to do to change the sleep setting. Can anyone help?