I purchased a new Windows 10 PC. I transferred iTunes to the new PC / Authorized new PC / iTunes sees my iPod Nano, and diagnostics sees it up to the "SYNC" test. Help is useless. I am unable to SYNC my iTunes to my iPod Nano. I have followed every instruction available by the community & still am unable to SYNC. This is so frustrating! So much money invested & can't even sync all of the songs I have invested money in.