Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
Your NOOK has approximately 1.3GB of built-in usable memory. That’s enough memory for an enormous library of books. However, it might not be enough memory if you add pictures, music, and audiobooks to your NOOK. Therefore, your NOOK’s memory is expandable using a microSD card.
Tip
A microSD card is not the same as an SD memory card like the kind typically used in digital cameras. A microSD card is approximately the size of your fingernail.