Your step-by-step instructions are great, thanks! It updated the Skoda Kodiaq MIB2.5 2020 from P0478T to P0480T.
I have used a regular 64GB SD Card, formatted (W11) exFat 4096kb. And used W11 7-zip to unpack the file from mib helper.
As in your instructions: I did not start the car, nor did I turn 'the car on'. Car was on a charger.
The last notion during the update process was a message 'that the system will turn on after 60 seconds'. As mentioned in your instruction you have to press the button itself (I did wait for approx 100 seconds) and after that it started and all works like a charm!
It took less than 15 minutes in total (and a lot more time research before hahaha) .
Grts from The Netherlands