Hello, thanks for this amazing thread: worked like a charm on my X1 35i 2014 that had the NA Premium 2014 maps. Updated to 2019 Premium Maps in one hour. The only caviar is that the USB stick must be formatted in FAT32, MBR partition (on a MAC, you have the choice in between GUID, MBR and a third one). Apart from that: everything runs smooth
Thanks again !