I have so many dem files and speedcams files. Does anyone know what is the latest for both of these files. I am near NY USA. Any help would be appreciated. I have collected so many over the years and I would like to get rid of the ones i dont need as you know that disk space on the unit is scarce and limited.

you can just get the latest maps/pois/etc for igo8.3. you can usually search around on other forums (not sure if gpsunderground is still active) to find the latest navteq us/can 2012 igo maps

This will just replace whatever files are in the respective folders in CONTENT folder.