Hi Phil, I never thought of a SDHC card bigger than 8GB because I am almost exclusively using "open street maps" (these are maps that you can download from the internet for free) and they are max. 4GB in size, as far as I Know. Furthermore I have never heared of somebody using a massive 32GB SDHC card in a 60CSX... On this card there must be enough space to store a worldmap + a map of the moon I have to admid that there are not too many roads on the moon but on the other hand the "Topo Australia-map" was also pretty large, although the outback does not have that many roads too ...anyway When I am traveling trough many countrys on one trip I just put the Openstreetmaps from each country to a 4GB or 8GB SDHC card in advance. When reaching a boarder, just switch to the appropriate map by changing the SDHC card inside the device. Thats better than dragging a laptop along on the trip.