Wifi Updates can be disabled and probably should be. The XML file should never be uploaded to Ford since you are using unofficial software, i therefore exclude the package that creates said XML. you are unlikely to get official ford updates but personally if your car was on any version before 3.2 i don't reckon ford cares and will even ever update you.
this is usually caused by FAT32 not exFAT USB's during the install, if you do this process with exFAT it should work, however knowing what version you on would help assist better