In my case I am not using any other device than the 62s. I have a new install of basecamp and an initial download of the CNNANT. To save time, I select the state of WI to send to the unit. I am simply using the internal memory, although I had tried to install a 4G card to see if that would help. I didn't try to format the extra card as mefreer did, but the problem exists whether using the add-on card or the internal memory. As mefreer stated, I can see the .img file on the unit in explorer, but does not show up when looking through basecamp. This is the only file I have (knowingly) loaded. Since Boyd points out that there are three files (.img, .unl, .gma), do I need to delete all of these types of entries? In addition to these frustrations and my efforts to correct, I have (apparently) deleted the basemap info the unit came with (on the advice to eliminate .gpx files). Is there a way to get these back?