I have a GPS map on my computer in the form of a 2.3Gb .img file. I read that I can put that directly on a SD card and the GPS can read it.
I have a USB cable plugged into the back of my computer 3.0 ports and into my GPS with a 4Gb SD card installed as drive N:. I dragged the .img file to drive N: and the transfer rate is about 335Kb/s. Is that what I should expect?