Lee
I have a new 400 (about 4 months old) and the color is green. It has a total of 32 meg of memory. I have a 512 meg SD card from SanDisk inserted. I only use the "internal" memory to store POI's, tracks, and the location of the caches I have out. Since I use the GPX files to locate caches, it takes more memory, that is why I use the SD card. I have all the caches in the state of Iowa on the SD card, broken up into regions of the state. I do understand that Magellan upgraded the memory on the 400's about a year ago. Also if you Google the Explorist 400 for firmware updates, you will find a firmware upgrade offered to the European users and not to the users of the North American units. Why I am not sure of. I have installed this firmware upgrade to my 400 as well as to my son's 210. Works wonders with both the units. New screens to use as well as a way to mark caches as found on the 210's. I have seen the accuracy increase by at least 10 to 12 feet. If you decide to use the firmeware update remember to back up your unit to you harddrive. It will clean out your internal memory. After the update, just transfer the date back to you 400. On Magellan's website you will not be offered this upgrade, but if you follow the link from Google, it takes you into the Megellan's overseas site. You will not be required to regester the unit to download the firmware. I do have the fireware update saved on a USB Flash stick. If you would like it can be zipped and e-mailed.
"old" devildog