If anyone might still be using the RadioGuy DD unit, like me, you can update your maps to the latest versions here...
https://www.facebook.com/groups/1510...vity&ref=notif
Just download 2023 Q(uarter)2, for the country you are interested in, then unzip into a folder on your PC.
Insert your memory card into the PC, then delete the entire folder contents, which match the set of folder names, found in the zip file.
Finally, replace them with the new folders. Safer, might be to copy everything to a second memory card, to work on.
The fewer the number of countries, you put on the card, the faster Primo runs, so don't put any on which you are unlikely to need. Usefully, you could maybe have cards set up for different countries, such as UK only, and EU.