My only issue was my sorry ass slow sat internet, this caused me to have to attempt to download the maps 3 times, 3 separate nights because of my download data limitations.
I did not change the name of any files, i can't see where/why in this procedure it would actually be required, i just followed the steps.
My advice would be to make sure you start the download with a blank usb drive. I formatted the usb drive between each attempt, i think the default format was fat32. I am using Windows 10 O/S, I did not change any format default, just selected format and in about 5 seconds a 16G USB drive was formatted.
Then i took it to the bike and got the fingerprint, it never took more than 5 minutes to recognize the usb and export the finger print.
Then, selecting the North America Maps and downloaded, since my sat internet is so slow, i was using the 3.0 usb drive socket on my computer, i fell asleep and that morning i checked the computer and it said, i think, Ready to Install.
I then turned on the power, radio, accept, plugged in the usb, it took about 5 + minutes to finish hand shaking between the bike and the usb, i was a little concerned that my download may have been incomplete, corrupted or something but then it took off and started the update, which took at least an hour and 20 min.
I'd make sure my usb was formatted, no files on it, and try again, because i thought i might be able to pick up where the download stopped, but each time during my first two attempts at downloading and it stopping, the navi software said my usb/device and computer were not hooked up, so partial download, must start over ie reformat the usb.
Good luck.