I've garmin 3590Lmt device which has 8GB of storage on board. When there is an update say its 6 GB update I have to install the SD card. Why? why cant it just overwrite the current map? I never had that problem with my old tomtom 930T. I have to delete manually old map (gmaprom.img) from gps to make sure that maps installs there I've 8Gb micro SD card in the unit but thats not the solution (or the answer). The only thing I liked about garmin is Voice command and the worst part is It cant understand my voice (again tomtom was very near with that... I'm not native swedish so I have accent). can you guys make it so that I dont have to use my sd card unnecessarily?