To fix the Steam Deck cloud sync error, ensure that SteamOS and your games are updated to their latest versions. Simply restarting your Deck often does the trick.

Is your Steam Deck not syncing to cloud? Several factors can cause this issue such as software glitch, steam server issue, outdated Steam Deck, or corrupted Steam library folder. To fix this Steam ...

Facing Cloud Sync Error on Steam Deck? Here are some quick and easy troubleshooting steps to fix the issue.