As a Barnes & Noble Legacy Member, you can convert your existing Membership to Premium Membership or add Rewards to your Membership to receive both your Membership benefits and Rewards simultaneously.
The option to upgrade will be presented to you the first time when you shop in a store and/or login to your bn.com account. You are not required to convert your Membership, and can continue to use your existing Membership as it currently stands.
See the Membership Terms and Conditions for full details.