Saw the title of this thread and immediately grabbed my harddrive. It's been like 5 weeks.
I used to use Time Machine, but at some point when I got my NAS I got issues and couldn't trust my Time Machine backups anymore, so that's when I bought Carbon Copy Cloner. I just have to remember to make them more often or try to fix Time Machine and use both.
What is NAS and why is Time Machine not reliable? Has worked for me no major issues as of yet (touch wood)
I've just learned over the years that storage is far less expensive and less hassle than data recovery
Network Attached Storage, I have the Synology DS215j. This drive is connected to my computer via wireless network, but I found that after some time the Time Machine would tell me my backup was corrupted and had to be redone. Maybe they fixed this issue, I'll try again soon. Used to work flawlessly to my Time Capsule.
- Both within a day, extremely low - environmental factors actually affecting both (such as theft or fire) notwithstanding. The more important consideration is if you would want to live without up to a full day of your data if your primary drive fails.
I changed my tune on that after a friend's Mac was destroyed by a water leak. Their backups were done hourly via Time Machine, but that did no good since the water got that external drive at the same time.
Once a day is good. Far better than most do I'm sure. Backup isn't just about hardware failure though. Ever been there sheets to the wind and over-written a file? Or needed to find what a document looked like in November last year?
Regardless, for a completely trivial expenditure, this is really simple stuff.