Add new web resource to library

Hello guys,

I'm new to this CRM and Dataverse,  might need your guidance on how to add Web Resource to a library ?

So in Dataverse I just add new Web Resource, but I don;t how to add this to a library. Some say in need to be in Classic View. so I'm already in Classic view then select the Web resource that I created. but don;t know what to do next.

Please help.

Thanks