Garmin will not provide tech support for the maps from this site because they don't make them. As far as Garmin is concerned, we don't exist.

Nevertheless, the maps should work on almost any Garmin GPS.
As I suggested, remove the SD memory card from your unit, plug it into a USB card reader, and try to install it directly on the card. If that works, put the card in your GPS and you should be good to go.