In the decade since its release, Angry Birds 2 has evolved from a simple slingshot simulator into a complex RPG-infused strategy game. With the introduction of the Arena, Clan events, and the Hat system, the grind to reach the "Diamond League" or fully upgrade a flock can take years.
If you want to backup your own file to transfer to another device or keep safe: angry birds 2 save file best
as your primary sync method, as it is the most flexible for cross-platform play. 2. Manual Backup (For Advanced Users) The Ultimate Guide to the Best Angry Birds
Safeguarding Your Flock: The Ultimate Guide to Angry Birds 2 Save Files Losing years of progress in Angry Birds 2 and the Hat system
Conclusion
For competitive players, the best save file is one with a high Arena rating.