Modern Astra models (like the Astra K and the latest TomTom-powered Astra L) use USB-based updates or Over-the-Air (OTA) technology.
The method for downloading and installing maps depends on your Astra's model year and infotainment system: cryptnav maps download opel astra
For systems like Navi 50, download the Naviextras Toolbox. This PC software detects your connected SD card or USB and offers available updates. Modern Astra models (like the Astra K and