How to Stop DerivedDataCache Maintenance ?

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copy default settings for Local and Shared variables from C:\your engine path\Engine\Config\BaseEngine.ini
under section [InstalledDerivedDataBackendGraph] for launcher build OR [DerivedDataBackendGraph] for source build

add it to your DefaultEngine.ini under same section then change/add : DeleteUnused=false or if you want change it in base config :person_shrugging:

so in DefaultEngine.ini those should look like :

; ...

[InstalledDerivedDataBackendGraph]
Local=(Type=FileSystem,   DeleteUnused=false ,  PurgeTransient=true, UnusedFileAge=34, Path="%ENGINEVERSIONAGNOSTICUSERDIR%DerivedDataCache", EnvPathOverride=UE-LocalDataCachePath, EditorOverrideSetting=LocalDerivedDataCache)
Shared=(Type=FileSystem,   DeleteUnused=false ,  UnusedFileAge=10, FoldersToClean=10, ConsiderSlowAt=70, Path=?EpicDDC, EnvPathOverride=UE-SharedDataCachePath, EditorOverrideSetting=SharedDerivedDataCache, CommandLineOverride=SharedDataCachePath)
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