打开 YourEngineFolder\Engine\Config\BaseEngine.ini
将
1 Local=(Type=FileSystem, ReadOnly=false, Clean=false, Flush=false, PurgeTransient=true, DeleteUnused=true, UnusedFileAge=34, FoldersToClean=-1, Path="%ENGINEVERSIONAGNOSTICUSERDIR%DerivedDataCache")
替换为
1 Local=(Type=FileSystem, ReadOnly=false, Clean=false, Flush=false, PurgeTransient=true, DeleteUnused=true, UnusedFileAge=34, FoldersToClean=-1, Path="%GAMEDIR%DerivedDataCache")
解决Unreal Engine 4.7.6的DerivedDataCache在C盘疯狂膨胀的问题
原文：http://www.cnblogs.com/Baesky/p/4483126.html