Garmin have been up to there old tricks and effectively trying to make older models useless despite saying that the units are LM or lifetime mapping. They have effectively increased the map details to such a point that when you try and load it, the 660 says you have insufficient memory. It does allow you to download areas of Europe, but these are only small, so say you pick France , you cant get Germany or any other country etc etc. not much use if you are taking a trip across Europe. We are not experts so if anyone has a better fix then please let us know, but this is what Michel L'Hours has come up with. Note: I also have a 590 and the maps went straight in no problem.