well, maybe part of the Super User community has just became close-minded:
Really? Close minded? We aren't trying to push this off elsewhere. This is a not constructive, period.
The other answer(s) also do the same
No, you just changed other answer to what you think works for you
Take a careful look at my answer, it puts "Look at the subjects / characteristics of your personal data"
Right, which is the obvious bit & what the OP has done. Rest and the comments are some random rambles about you think is right and ducks and what not.
Like slhck and Daniel Andersen says, there's no way a constructive answer can be based on that. At the end it's just opinion. A 600GB data store maybe "big" for some, not for others.