Hi. I am just wondering what the limitations are when you use the free version of Carbon Copy Cloner? Can I download it rom the site and use it once to make a bootable clone? After 30 days will that bootable clone work anymore? I'm sorry if this is a "common sense" kind of thing. I backup all my data onto 2 identical external drives regularly, but I was thinking of creating a bootable clone on a 3rd external drive I have in case my iMac's internal drive dies one day and I can't afford to repair or replace the iMac.