Unlike SYNC 3, which frequently utilized manual USB downloads, SYNC 4 is designed primarily for updates, often referred to as "Ford Power-Up" software updates. How to Download SYNC 4 Updates
If you suspect your system is behind but hasn't updated yet, you can force a check while connected to a stable Wi-Fi network. Springfield Ford Software Updates for SYNC® 4 & 4A | Ford Owner Support ford sync 4 update download