hello to all new to site.
i have 1 xxl 540s and 1 xxl540 m what do i need to install and activate the new current maps i think it is 930.and how do you install it
do i make a back up of what i have now before doing any changes.??i'm a truck driver so i depend on my gps all the time.i did a few searches but was a tad confuse as what is the right tools to download for my units.?? thanks