@henrih You can try going to opea://bookmarks and remove the extra devices in Other Speed Dials, but you probably will need to reset your synced data to get out of those devices.
@tidus Some extension perhaps? Opera wouldn't be sending images to Google on its own. And why in Synchronization - this forum is about synchronizing Opera on multiple computers/devices and not Google. What platform are you having this issue on? (Windows 10 PC, Android phone or tablet, etc.)