When I'm trying to update my navigation system, the TomTom HOME app displays an error message, stating that there are errors on my memory card that cannot be repaired by HOME. On some occasions it says that my memory card is read-only, when it is clearly not. The suggestion to insert the card in my device, turn it on and off again does not help. Neither does removing the loopdir folder from the memory card and then re-inserting it into my device.
I own a Carminat system built in my Renault Scenic.
I have TomTom HOME version 18.104.22.168 installed on a MacBook Air with MacOS Catalina 10.15.5