We are talking about the Samsung Galaxy A6+, which was released in 2018. The firmware needed for Android 10 update is huge, 3.24 GB. And the firmware’s build number is A605FNXXU5CTC8.
The system includes the Android March security patch, as well as the proprietary shell One UI 2.0 with many changes, including an updated interface, a dark theme, etc.
The firmware has so far begun to receive on the SM-A605FN models. Other versions of the smartphone will receive an OTA update a bit later.