we purchase the Magellan RoadMate 6000T for a trip cross country . we arrive with only one misdirection , which Magellan quickly recalculate and send we in the right direction . we love this unit , but it will not backup we information . I try 3 different sd card and have Magellan customer Service walk I through the process several time . finally on the third call to customer support , while they put I on hold I research this problem on the internet and find it to be a common one . customer support could only advise I to send it back to be service ; they never admit this can be a issue . to make the call to customer service even more challenging , each time I call the person on the other end of the phone , have difficulty understand I , and I to , have difficulty understand they . we currently live in a very high traffic area , and never leave home without it , but we be plan to return it after we new Garmin arrive .