Genshin Impact progress missing on a new device? Check the account and server
Seeing the opening scene again usually means you should check both the login method and the game server before concluding your old progress is gone. Start on the original device if you still have access: record your UID and server, then check which HoYoverse account or third-party login is linked. Do not create or unlink accounts in a hurry.
TroubleshootingCan't join a friend in Genshin Impact? Check these co-op restrictions
First check both players' server, co-op unlock and current quest messages. Then compare the host's World Level with the visitor's. A convenient test is to have the higher-level player visit the lower-level player's world, if the game permits it.
TroubleshootingGenshin Impact download failed or running slowly? Fix the right problem first
Start by separating download errors, lack of storage and in-game performance. They need different checks. Use HoYoPlay on PC or your platform's official store/update tool; avoid deleting game data as the first step.
Troubleshooting