Thats odd , no usb port to cars system.
My 2013 XC60 was a CD map update model , took it to my friendly dealer at Moss Vale and they said they updated it via the usb in the centre console arm rest with their laptop from now on , that was 2 yrs ago.
I'll be there tommorow getting a new windscreen installed in the xc60 ( stone chopps and leaks from top passengers corner due to detaching of screen and sealant) , more on that story with a different post later.
Let's just say windscreens obrien are not the honest people they say they are , as I was prepared to pay the difference between their cheap nasty screen (non original that they charge $962 if you walk in off the street plus fitting) .
Check with a reputable Volvo service centre and check that there's no usb port , odd.
Any cd updates will be out of date by now anyway.