Help removing maps

[freejon]

Does anyone know how to remove maps from a Oregon 400t. I loaded the NE USA Topo maps. I want to remove them to make room for other maps. Any help would be appreciated.

[Indrid Cold]

Well, if you loaded maps to the unit, they will be written over the next time you load maps to the unit unless you have renamed the gmapsupp.img file. That's the easiest way to deal with it. The other way is to mount the garmin drive and delete the gmapsupp.img file. Beware that deleting the wrong file can make your factory garmin topo vaporize or worse...