I bought the 3790LMT last year. Throughout the time, I have installed some extra data into my GPS. (Such as vehicles and voices) But now, I would like to delete all the extra stuff I have installed. But at the same time, I want to keep the data that originally comes with the GPS when I purchased it.
But I have already forgotten what data belongs to the one I installed and what data is the one that comes with the GPS... I tried the re-set function, but it only re-set all the settings to default, all the extra files are still there. So, I wanted to ask is there a procedure that will allow me to somehow "format" my GPS then re-install the default system? Thanks in advance!