Nikon Digital Cameras Reference Manual page 32

Once the contents of the memory card have been copied,
the progress indicator will disappear. The Digital Camera
folder is located in the destination folder and contains the
complete contents of the memory card.
Use the same process to copy the entire contents of the
memory card when using a card reader. The complete Hard
Disk folder can be copied in the same manner.
You can also copy the entire contents of the camera's memory
card using a drag-and-drop operation.
The progress indicator will be displayed while the items are
copied to the clipboard. Click Cancel to abort the operation.
Once the contents of the memory card have been copied, the
progress indicator will disappear. The Digital Camera folder is
located in the destination folder and contains the complete
contents of the memory card.
Use the same process to copy the entire contents of the
memory card when using a card reader. The complete Hard
Disk folder can be copied in the same manner.
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