syncing itunes to ipod classic _mojave os

I believe there is a way to sync itunes to a classic ipod, but I am unable to do so. I have connected my ipod with a cable to my mac and the device appears in itunes. The only place I can find the syncing option is in: Itunes>file>devices>sync. But sync is greyed out. the only option to select is "Transfer purchases from my ipod"

In Itunes>preferences>General> I have unchecked ICloud music library and in Itunes>preferences>Restrictions> Disable> I have checked Apple Music .

I also manually dragged songs onto my ipod using finder, but while on the Mac screen I can see the songs are there, they are not on my ipod. Please let me know what I am missing so that I can sync my ipod classic.

Thanks!