A Roon Nucleus is a device sold by Roon Labs to act as your Roon server. It is nothing more. A Roon Nucleus should be connected by ethernet to your network via switch or directly to router. A computer running the Roon control software should be connected to the same network, usually by WIFI but sometimes by ethernet.
To move music to the Nucleus, drag and drop from the current storage location to the installed hard drive inside the Nucleus.
