[quote:29399]Are there TNT Tutorials that covers this topic ?[/quote]
not any TNT tuts as such... but you can find some relevant info, e.g. where Logic, by default, store the sampler instruments and audio samples for EXS24 and how to organize and move them to other locations (plus much more!) in
Logic 8 102: Exploring the EXS24
I'd also recommend checking out the Mac OS X 101: Mastering your Mac
if you feel that you could be more comfortable getting around OSX.
And of course, if you have any questions, don't hesitate to ask here :)