I would get a new SD Card and load onto that and keep the original as a back up in case it all goes wrongI'm not sure about the new 38Kwh EV, but on my 28 Kwh EV there is a removable plastic flap in the center just below the infotainment display that gives access to the SD card which can be pressed in to allow removal. Instructions on how to update are on this forum if you do a search.
. It is with native apps like Spotify. Or Apple Music. Sound is really low. Also with sorentoand just installing sorento it fixed the sounds for 3rd part apps without doing anything. Just make sure that you either have your phone connected to the car with Bluetooth or have a usb media plugged in.
. It is with native apps like Spotify. Or Apple Music. Sound is really low. Also with sorento