cparks

I got my Ax yestarday, and so far I love it!! No if I can just figure it out. I am now trying to learn how to install programs, I am going through the disc and installing what I will need. I am trying to install some eBooks. Which looks like a basic drag and drop type thing. I noticed when I opened Mobile Device/My Pocket PC there is a 'My Documents' folder that contains several other folders. Then there is a 'Built-in Storage' folder that contains another 'My Documents' folder which is empty.
The eBook instructions say to copy the books to the My Documents folder. What are the differences in these 2. I'm assuming the Storage one is the one I should, but what is the other for?
Also, is there a wat to relocate the My Docs folder to my SD Card?

Any insight would be great