UE4 更改DerivedDataCache 位置

.\Epic Games\UE_4.24\Engine\Config\BaseEngine.ini

[InstalledDerivedDataBackendGraph]
MinimumDaysToKeepFile=7
Root=(Type=KeyLength, Length=120, Inner=AsyncPut)
AsyncPut=(Type=AsyncPut, Inner=Hierarchy)
Hierarchy=(Type=Hierarchical, Inner=Boot, Inner=Pak, Inner=CompressedPak, Inner=EnginePak, Inner=EnterprisePak, Inner=Local, Inner=Shared)
Boot=(Type=Boot, Filename="%ENGINEUSERDIR%DerivedDataCache/Boot.ddc", MaxCacheSize=512)
Local=(Type=FileSystem, ReadOnly=false, Clean=false, Flush=false, PurgeTransient=true, DeleteUnused=true, UnusedFileAge=34, FoldersToClean=-1, Path="F:/Unreal_424_DDC/DerivedDataCache", EditorOverrideSetting=LocalDerivedDataCache)
Shared=(Type=FileSystem, ReadOnly=false, Clean=false, Flush=false, DeleteUnused=true, UnusedFileAge=10, FoldersToClean=10, MaxFileChecksPerSec=1, Path=?EpicDDC, EnvPathOverride=UE-SharedDataCachePath, EditorOverrideSetting=SharedDerivedDataCache)
Pak=(Type=ReadPak, Filename="%GAMEDIR%DerivedDataCache/DDC.ddp")
CompressedPak=(Type=ReadPak, Filename="%GAMEDIR%DerivedDataCache/Compressed.ddp", Compressed=true)
EnginePak=(Type=ReadPak, Filename=../../../Engine/DerivedDataCache/Compressed.ddp, Compressed=true)
EnterprisePak=(Type=ReadPak, Filename=../../../Enterprise/DerivedDataCache/Compressed.ddp, Compressed=true)

改Path= 部分，指定到硬盤位置，因爲這個緩存很佔地方。

從Launcher下載的引擎修改這個，如果是源代碼，修改.ini 上面代碼的上一個段落裏的path。