|How do I use the SD memory card with my nook?|
If you insert a supplemental microSD card in your nook, your nook will have two USB drives displayed on your computer when you plug it in. The second one is for the SD card.
You can create any folder hierarchy that you like to organize your files. When your nook scans the microSD card for files, it looks for files of specific types everywhere on the card. When your nook presents the files to you, it flattens the hierarchy and presents a list (which stinks by the way).Click here to read about how to install the memory card