I'd personally use Time Machine, it's all integrated etc.
Both.
I use Time Machine but also run SuperDuper! once a day to clone my boot drive. That way if my main drive fails then I can simply boot from the SuperDuper!'d drive and I've got a data backup on my Time Machine.
What's special about three? More like Rule Of >1, the higher the better.
whatwhat
Well if you really value your data then it existing in less than five places isn't enough.Well if you value your data then it existing it two places still isn't enough.
Well if you really value your data then it existing in less than five places isn't enough.
How valuable it really is, the how, the where and the accessibility determines the acceptable number of copies, not a hard and fast rule. 2 can meet this criteria just as 3, 4, 5 .. can.
Both.
I use Time Machine but also run SuperDuper! once a day to clone my boot drive. That way if my main drive fails then I can simply boot from the SuperDuper!'d drive and I've got a data backup on my Time Machine.