Hi
thanks for the ideas.
The Xperia connects OK to my PC for file backup, viewing photos etc etc . I get a notification on the phone where I have to enable file transfer. USB appears in the Device connection area, and I have to enable File transfer every time. With the Karoq the USB option does not appear, and there is only Bluetooth in this area.
I have tried enabling developer mode, and searched "USB" in the Settings - and then enabled everything I can enable (most grayed out), but no joy.
New cable should be here today - I am using the Skoda supplied adaptor cable at the moment, as that is the only USB-C to USB-C that I have.
The wife's iPhone just connected and worked from the off, no apps to download or anything.
Good job I kept the old vent clip phone holder...
D