Where Are Unreal Engine Vault and Projects?
Unreal VaultCache under ProgramData plus the Documents Unreal Projects default on Windows.
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Unreal downloads marketplace content into a VaultCache under ProgramData Epic, and creates projects under Documents, Unreal Projects by default. The two serve different stages: vault is the library, projects are working copies.
Both paths move in settings and ini files. Long default paths break Visual Studio builds, which is why moving projects short (or SUBST mapping) is folk wisdom.
Where Unreal Engine stores this, by platform
C:\ProgramData\Epic\EpicGamesLauncher\VaultCache
Change it in Launcher Settings, Edit Vault Cache Location. Projects default to %USERPROFILE%\Documents\Unreal Projects; set CreatedProjectPaths in the ini files to move that.
Frequently asked questions
How do I change the default Unreal project folder?
Set CreatedProjectPaths in GameUserSettings.ini (launcher) and EditorSettings.ini (editor versioned path). New projects then target your folder.
Can I delete VaultCache to save space?
Yes for items already made into projects; the launcher re downloads vault items on demand. Keep project folders themselves intact.
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