Discord Nitro is a subscription-based service that allows users to access various premium features. These features include access to particular servers, increased file upload limits, and HD video streaming. To get unlimited Nitro on Discord, visit the Discord Nitro store page on the Epic Games Store. Be sure to log in and press the "Get" button. Follow the instructions provided to complete your free order. Once you have completed the order, your Discord account will be upgraded to Nitro.