All sat navs back up in pretty much the same way.

1. If you haven’t already done it, install the software that came with your sat nav.
2. Launch the software on your computer and select Make backup in the options.
3. If you’ve made backups before, a list of them will appear, alongside the dates you did them. If you’ve never done it before, the backup list will be empty.
4. Click the Backup button.
5. The backup process will begin.
6. Congratulations! You’ve made a complete backup of your sat nav.