Should vs. shall?

[FrankU]

Hi again, I'd like to understand the difference between shall and should in this sentence:

Where shall I put these files?
Where should I put these files?

Is there any difference and if so, when shall/should I use which? Thanks!
Frank
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So, who is the best online chatter in world ?

[Conchita]

[Jamie (K)]

To me they have nearly the same meaning, the difference being one of softness or politeness, rather than of meaning. For me the difference is more in the realm of that between, "Can I do this?" and "Could I do this?"

Maybe I'm not qualified to comment on this, though, because the word "shall" is almost never used in America, and 99.9% of the time we would ask this question using "should".

Now we need Alan's opinion.