i have regularly updated my Octavia III since buying in 2016 without any hitch. I had to trade it in for a 24 plate Kodiaq (think its the 23 facelift) fitted with an Amundsen (one with 2 knobs) but there are no SD card slots just USB type C by the charging bin. The car has an embedded SIM card with a membership valid until May 25. Ive put the down load on to a USB stick and with a USB converter plugged it into the type C ports. I don't seem to be able to install POI's as previously succesfully installed on my Octavia also with Amunsen.
Has anybody been successful as i have to revert to TomTom or Google maps via wireless Android Auto to receive warnings (which are comprehensive). Unlike the Octavia the maps on the new Kodiaq are quite good with seemingly no stupid routes and even a trailer option.
One negative point is the charging box (or cooking box). After a 2 hour trip with the phone in the box "charging" and using Android auto the phone cuts out with an over temperture alarm and almost no charge in the battery!!! Found it better to charge by cable in the 12v plug and use wireless android auto. Using wired AA in the USB-C does not keep up with the discharge so you can run out of charge.
For all that the car is fantastic.
Kodiaq SE-L Executive 1.5 DSG in white with leather.