During a trial of Nira, all of your assets automatically receive the premium features. If you notice mentions of Usage Type, Premium Assets, and Gallery Assets in our documentation but cannot find these concepts within the user interface, rest assured that you're already receiving the maximum asset feature set that we provide.
If you decide to sign up for a Nira subscription, you'll need to pick a usage type for the assets that you uploaded during your trial shortly after signing up. You can also delete any assets that you no longer need without picking a Usage Type.
Why isn't Asset usage type selection allowed during a trial?
The process of picking a usage type can sometimes require a credit card to be on file, and a credit card is not present during a trial.