Vault Cache

Hi everyone,
i need some space on disk, and i found folder “Vault Cache” that have >30gb !
What will happen if i will delete it ?
In internet i founded just that this folder makes duplicates of project, so i dont think that will happen something really bad.

You can delete it, but need to download content again if you want to add it. You can also assign a new VaultCache destination in the launcher settings. The location of the VaultCache as of August 2019 is C:\Program Files (x86)\Epic Games\Launcher\VaultCache see also Where is the Vault stored? - UE4 AnswerHub