I am running a traveling agency for arranging the tour plans for the tourists. So, I am using GPS technology for finding the right routes or locations exactly. I believe in using Garmin GPS unit for tracking the unidentified locations or destinations. I am using three old version of Garmin GPS unit, so it is showing the old list of roads and locations. Roads, routes and locations have changed, so I want to update my Garmin GPS unit on a daily basis. I don’t have complete knowledge about update Garmin GPS. So, I look for Garmin expert guidance for this update issue. Therefore, I am asking from Garmin experts to recommend the best methods to update Garmin GPS unit in the correct ways.