I would power it off. Recent recommendations on this old issue indicate that the stresses of turning on and off are less now in new model hard drives than they were a few years ago. You save both electricity and wear on the bearings. Kevin Willis <res19rmg at verizon.net> wrote: > I just started using the "sleep" mode on my G4 instead of shutting down > every night. It has been running for about a week now. I have a 40 Gb > drive installed in an external case connected to a USB port. The > external case has it's own power switch. Should I power off the > external drive when I put the system to sleep, or should I let the > drive spin until it eventually crashes? > Al Poulin Anger, hate, and revenge are for the devil, forgiveness is for God, proactive self-defense is for the rest of us.