Using a Windows computer, re-format to ExFAT or FAT32 and ensure those are the only files on there. Follow the read-me on how to properly put the files on. Then, plug in the USB drive and turn car on, the screen will look like it does above. It takes 20-30 minutes for the update and will tell you to remove the USB drive and turn car off once finished.
The non-nav update is a two part update with two different zip files, will upload files in just a moment that have a read-me explaining how to properly do it. Half-way through part 1 on my non-nav unit now.