[Q] Can you clear up my confusion about SD Card?

view story

http://forum.xda-developers.com – I understand that my Galaxy Nexus does not actually have an SD Card, but an SD card folder, right? So for best performance I can move some files, like most downloaded apps, to the SD Card folder. Maybe data files like eBooks, right? Then I get lost. I have downloaded a couple of apps that are supposed to help me move things to the SD Card, but I don't quite get how to move them. Some SD Card apps show a list of apps that can be moved, but there does not seem to be a place to tell it, 'OK, do it.' I know I can attach to my PC/USB and see the file folders, but it seems like just drag & drop (HowTos)