My external is the chosen place where my backups are being stored. It gets annoying when the laptop needs to spin up the HDD to initiate the backup as everything on the laptop stops for a moment or two while that happens. I'm also concerned of the unnecessary wear and tear by constant turn off and on. I'd much rather have it so that when I put my laptop to sleep, or wake it up, it should do the same. I have already checked the box which says do not turn off HDD when possible, seems not to have made a difference for external devices?