Renault navigation maps and software for Media Nav or R-LINK systems are updated via the official Naviextras portal using a USB drive to sync vehicle data. The process involves capturing a "fingerprint" of the system, using the Naviextras Toolbox software to download updates, and installing them back in the vehicle. For a step-by-step guide and to download the necessary tools, visit renault.naviextras.com "How to update?" guide - Renault Navigation Map Update