@Ants RS, is your map on a SD card, and the screen divided into four square sections? If so…you have Sync 2. If your Home Screen is a light blue with icons along the bottom, then you do have Sync 3. The latest software is v3.0 20045 and F9 Maps, there is no SD with Sync 3.
I’m 30 minutes into the update from 3.0 to 3.4 and so far matching the time frames with the YouTube video. Fingers crossed it will all go smoothly and I’ll have the new software up and running in about 15 minutes.