I noticed my system was backing up a lot. Checked Time Machine and it had backups almost every hour and the setting screen says backing up every hour for next 24 hours. I see no option to stop this and it's set to delete old backups when it runs out of space, yet I don't see how many are being deleted. The problem is that if I need to go back to an older one, I'm stuck with only hourly new ones. Version 10.8.2 The only option I see is to select disks/files or to turn it off. I certainly don't need hourly backups, even daily is a bit much but ok. My concern is also some kind of malware that would cause this in an effort to spread itself to all my backups. Q. where do you change the hourly backup or is it an option?