Be sure that Mass Storage Mode is enabled.
Go to Options > Media Card > Media Card Support > On
and then Mass Storage Mode Support > On
and then Auto Enable Mass Storage Mode When Connected > (set to Yes or Prompt)
Then when you connect the device to the computer with the USB cable and enable Mass Storage Mode, the card will show up as a Removable Drive on the computer.
Then you can just copy files over the same as you would do any drive or location the the computer.