Organizing folders under My Computer, but not synching on Sansa

I tried organizing new folders while connected to my PC.  I used My Comptuer while the Sansa was plugged in and moved folders around.  Nothing changed on my Sansa.  Am I missing a step?  Thanks!

I am trying to prevent my podcasts to go under music, so the podcasts don’t play with my music files when I choose “play all”.  Thoughts?

“Also, I may have mis-spoken above, as I’m not sure that all your media has to be filed under the Music folder; I just experimented with my podcasts in a separate .PODCASTS folder at the same level as the Music folder, and the podcasts got picked up just fine.” 

I am curious how you did this?  I do want a separate folder at onset.  Thanks.