Cliffy, Cliffy! Start without the card in the unit. When GE asks for it put it in then.
Caty & SF, GE doesn't support the older units such as StreetPilot c3x0, 26x0, 27x0. So Garmin has to keep MU & WU on the shelf for the time being. I bought a 2720 'for parts, not working' very cheap. I've got it going and guess what? It's got LM for whole of NA! So have to use MU to update it but gotta select a small sub-region or US only because of restricted internal memory and no media card slot. I agree that MU is conspicuous sometimes with newer units and i've also rolled over completely and now use it routinely [but mostly with xml on usb drive as a stunt double if i can].