I bought lifetime maps for my Garmin GPS, and just tried updating them, and after 1.5hrs just ended up with an error and broken maps. I clicked Settings in the lower left corner, and then in the Installation section, I verified that it was set to install on my unit.
choose Option 2 instead), skip to the next section: I downloaded the Garmin Lifetime Update program.
Then after over 30min of downloading files, it prompted me to unplug my GPS from the computer and reboot it, then reconnect it.
The 26 models did not come with a CD and the maps were pre-installed on the 2.2GB Microdrive. The 26x0 models were replaced in July 2005 with a 3.5" 320x240 touch-sensitive color screen.
The c310 and c320 models used a 128MB SD card and the C330 model had the maps in internal storage. It was released in August 2005, adding FM traffic and text-to-speech capabilities to the C330.
After rebooting, I clicked Tools Map Info and saw that the maps were NOT yet updated (still had my same old maps).