Can anybody tell me the specification of the memory cards that will work in the latest version of the Audi RNS-E system. I had the system in my 2012 Black version S3 stolen and replaced by Audi last month. When I bought a 32Gb card to load music it wasn't recognised by the system. I'm assuming the card isn't fast enough, or too fast. The manual says it will take 32Gb cards but doesn't specify any more than that. Thanks in advance.