I've got a brand new Montana 600t. I have installed a 2.0 g topo map micro SD in the unit and have transferred a bunch of waypoints and tracks to the unit. When it's plugged in to my computer and I check the unit's properties to see how much internal storage space is free, it's showing 296 mb out of 3.60 g are available.
What could be eating up so much space? The pre-loaded topo maps from Garmin?
The lack of space is preventing me from uploading very many Birdseye images.
Thanks