Is it bad to have an external drive power up, back up, and power down every hour? Will it decrease the life of the hard drive? I have a western digital 1TB My Book. I feel backing up every hour isn't really necessary in my situation; maybe daily or weekly would be better. If, however, it doesn't hurt the drive to power up and power down every hour, I guess it doesn't hurt to back up that often. What do you guys think? Thanks.