In Win10, itunes sees ipod classic, but won't sync
I have a classic ipod (160GB, software version 2.0.4) that is about five years old. I recently (within a month) bought a new laptop (Dell Alienware, Win10), and installed itunes (current version 12.3.7.46). I also successfully transferred my itunes library to the Dell. I've also done at least two syncs previously. The ipod was also working properly (with only one mysterious "freeze and restart") the whole time.
Yesterday, I plugged the ipod in, and got an itunes message saying that there was some trouble recognizing the ipod (sorry, I did not note the details). Eventually it suggested I reset it to factory default, so I did. Now, when I connect it, itunes "sees" the ipod (see attached screenshot), and the ipod screen shows "Connected", but pressing the "Sync" button in itunes does nothing.
The ipod is also recognized in Explorer, when selecting "This PC" in Windows. Both itunes and Windows show the ipod as empty (big mistake, but oh well).
I have tried restarting my laptop, starting itunes again, and re-connecting the ipod. Still, itunes (and Windows) "sees" the ipod, but pressing "Sync" does nothing.
OBS iPod classic, Windows 10