If you use Microsoft OneDrive, it may be trying to sync the Documents\StarCraft II folder while the game is trying to write to it. Pause syncing in OneDrive.
Here is a step-by-step guide to break the cycle and get back into the game. 1. Delete the Battle.net Cache and Files
However, problems arise when this routine gets stuck or fails to complete. Instead of a quick check, the game becomes trapped in a loop, repeatedly attempting to verify data or hanging indefinitely. According to official Blizzard support, the "preparing game data" error and its variants are most often caused by —meaning a game update may have been corrupted or didn't install correctly.
A corrupted cache in the Battle.net app can also trigger the loop. starcraft 2 preparing game data verified
: Files in the ProgramData or AppData folders may be corrupted, causing the verification process to fail and restart.
If the Battle.net app is the bottleneck, you can skip it entirely by launching the game directly.
This loop often occurs due to corrupt temporary data, firewall interference, or outdated background processes. If you use Microsoft OneDrive, it may be
The Battle.net Agent is the actual program that handles the "Verifying" text. If the agent is outdated or stuck, your game will never launch.
Data is sometimes served from secondary, slower servers, leading to very low download speeds (e.g., 50-100 kb/s) even on fast connections. Blizzard Forums Common Fixes for Persistent Loading
To avoid encountering the "Preparing Game Data" issue in the future: According to official Blizzard support, the "preparing game
: Let the launcher complete the download, then open StarCraft II.
: Once inside the main game menu, navigate to Options > Language, switch it back to your preferred language, exit the game, and let Battle.net download the corresponding localization pack completely. Preparing game data before every start up - Blizzard Forums
I can provide specific steps to clear up cloud syncing conflicts or analyze the exact error logs. Share public link
SC2 → Options → Scan and Repair
If the step takes longer than 2–3 minutes or repeats every launch, possible causes: