[Q] Computer Doesn't See USB topic

I am running CM10.1 from a mSD card. When I connect my NC to my computer via USB cable it isn't recognized. The NC is recognized with the mSD card out of the NC and booted into the NC's OS. Computer OS is Linux. I ran fdisk -l just to check and card in it is not seen. Is the NC recognized only with no card in or what. The CM10 was unlocked. I wanted to transfer some book files over. Will I have to pull the card and plug it into my computer?