usage notes: say whether each drive was USB or wireless, and whether music went over USB or Bluetooth

README.md

@@ -98,7 +98,8 @@ turn them on, in setup or in Settings.
 - **What they carry.** The Gearslip version and which boxes you ticked, plus whatever
   those boxes cover: the Android version and whether the phone runs GrapheneOS, the phone
   model, whether a car connected that day, and each car's head unit, model, year, screen
-  size, and connection result. Settings shows the exact note. Untick a phone detail, and
+  size, and connection result, with whether that drive used the cable or wireless and
+  whether music went over USB or Bluetooth. Settings shows the exact note. Untick a phone detail, and
   the server drops the copy it kept.
 - **What they leave out.** Your name, accounts, location, contacts, messages, and
   anything you type or play.