I have Sonos systems in two homes.  At our primary home, our iTunes library (contained in a Mac Mini) is captured on the Sonos system.  As the Mac is located at the primary home, the iTunes library is not available on the secondary home system.  I’m planning on transferring the iTunes library (<4TB) to a portable NAS device and am looking on feedback on recommended devices and success/failure in transferring the library to the device and adding the music library to the Sonos system at the secondary home