How do you sync from USB? On AnkiDroid, how do you sync from USB?  I'm unable to find the option in settings.  Is it just a matter of having your device plugged in via USB and having AnkiDesktop open?
AnkiDroid developer here.

It does not work so easily unfortunately.

Right now the easiest/safest would be:


Export your decks as an APKG file
Copy the APKG file over USB
Open the APKG file in Anki Desktop




There is a more convenient solution but it is very difficult to set up initially:


Set up Android to to Ethernet over USB
Install your own sync server
Compile AnkiDroid with your own sync URL