If you have spent any amount of time in the Koprulu sector, you have likely encountered it. You queue for a ladder match, the countdown finishes, the map loads to 100%... and then you see it: the infamous yellow or red text in the bottom-left corner of your screen: "Preparing game data."
StarCraft II folder and Documents\StarCraft II folder to your antivirus exclusion list. Real-time scanning of .SC2Assets files as they decompress will triple your "Preparing" time.Documents folder syncs to the cloud, every cache file you create gets uploaded. Disable OneDrive for the StarCraft II folder. Cloud syncing creates file locks that stall the "Preparing" process.Collecting game data for Starcraft 2 can be done through various methods: starcraft 2 preparing game data extra quality
The screen goes black.
The fix: Move StarCraft 2 to your fastest drive. StarCraft 2: Preparing Game Data for Extra Quality
Are you seeing a specific error code or a download size (like 137MB or 600MB) when this message appears? Preparing game data - Technical Support - SC2 Forums Fullscreen Windowed Mode: This forces the desktop compositor