Trouble loading new sounds to MPC through USB connection

I have a limited edition MPC 2500 with all of the optimal memory and hard-drive and then a (128mb mpc sound library card) that came with it. WHen I load my MPC to my computer via USB... it is saving to the memory card and so I guess I need to get a bigger memory card (sandisk 2gb cf looks good) Anyway, I am wondering how to save on my harddrive (since i bought the limited ed) i figure i should make good use of the internal harddrive) and also there is definitley more space on my memory card than i am trying to upload more information to and it wont let me upload to it saying there is not enough space.... anyone have and idea how to get around that? THanks

UPDATE: I just deleted the entire disk by using the delete button on my desktop and it says i only have 156kb available when it should be 128mb? Are there better ways to delete?

I just went to utilities and erased the entire card and now i have 123.5mb...but there has to be a better way to do this

Just select the harddrive in the USB tab in Load/Save Mode. It's also in the Manual Addendum.

Yea i knew that already... ahah... thanks for not being too hard on me for asking a dumb question