For all of you out there with Chinese NANO clones, or older Arduino NANO’s, there has been a recent change. The upload baud rate has been bumped up from 57600 to 115200, and that causes a upload error.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xf6
The solution is at hand!
Tools > Processor > Atmega328P (Old Bootloader)
and your upload woes should be solved!