What a palaver!! I took a backup of the folders on the Satnav last night and saved them to the laptop. There is only one main folder called NAVI. Secondly, this morning, I downloaded the massive 6.6gb RAR file from the link Ohrex send in an email with instructions in a PDF. Simples. After 6 hours I finally managed to get one RAR downloaded, but only after multiple failures when it was part way through. Then I connected the Satnav by the supplied USB cable. It's USB-mini and luckily they supply a cable. Everything I have now is either micro, USB-A or USB-C. Only then once the RAR file is downloaded and unzipped (7-zip) can you format the satnav drive! Yes format. Once formatted then use Windows to copy the NAVI folder from the unzipped folder to the satnav. Copying at 2 to 3 mb/sec means that over 7gb unzipped will take a while. Much easier with the TomTom where you connect and let if check for upgrades.... It took way over an hour to copy from the laptop to the u...