Go to your GTA 4 installation folder (usually under Steam\steamapps\common\Grand Theft Auto IV\GTAIV ). Right-click on and select Properties . Click on the Compatibility tab.
Sometimes the game thinks it wants to sync to a cloud that no longer exists. gta 4 save failed please check your storage link
Turn off backup for your "Documents" folder in OneDrive settings . Go to your GTA 4 installation folder (usually