Stopping Calibre fom connecting to Kobo

Hi

I'm new here so apologies if this has been asked before and I've missed it :o

Is there a way to have Calibre running and NOT connect to a Kobo when I plug it in? All I want to do is export books to a folder, plug the Kobo in and then transfer them under Windows to the SD card in the reader. I don't want Calibre to do anything as far as the Kobo is concerned and I certainly don't want it to put files on there and try to organise things.

At the moment I do everything I want in Calibre then exit before connecting the Kobo but If I forget it starts writing files. It also means that if I have the Kobo connected and want to do something in Calibre I have to eject it, do the things I want in Calibre, close Calibre and reconnect the Kobo. It's a pain but I can't find a way to make it ignore the reader.

Any ideas please?

Thanks,
John.