Sorry for any delay.
Can you tell me the NUMBER of your START? (The 4EF00 is more of a "case number", and can be for several different models).
If you can send me the first few characters of the SERIAL NUMBER, I can probably find that model number.
Also, is there a "microSD card" slot - somewhere on your device? If there is, you may be able to add a microSD card of about 8GB of capacity to let you install ALL the maps on the device.
One more thing: Are you using the TomTom "HOME" program or the "MyDrive Connect" program to update your device? And whichever program it is, do you have the latest version of that program?
I only ask that last one because I believe BOTH programs should offer you a choice of ONLY the United States - as a "zone".
I have links to a couple of videos that show using HOME (first link) and MyDrive (second link), to load the zone that will fit on your device.
Video for HOME --> https://www.youtube.com/watch?v=X6KEb4TQhlY
Video for MyDrive Connect --> https://www.youtube.com/watch?v=UUx2HUKTtZk
Please let me know if you can find that SERIAL NUMBER or a microSD card slot in your device, or if you have any other questions.
Thanks, ***** *****