Edit:
My bad, I was thinking about flashing the modules in the car for most cases.
Sync updates can be downloaded directly from Ford and saved on a usb drive.
https://www.ford.com/support/how-tos/sync/sync-updates/download-sync-with-myford-touch-software-updates-to-a-usb-drive/
Your best bet for finding more info on this is joining the Ford forums. The system may be tied to your vehicle's VIN, so I don't know if the update will work if you received the files from someone else, just keep that in mind.