Which of the following allows users to recover their deleted files on file shares by themselves?

Shadow Copy aka Volume Snapshot Service/Volume Shadow Copy Service/VSS:
-technology included in Microsoft Windows
-allows taking manual or automatic backup copies or snapshots of computer files or volumes, even when they are in use
-implemented as a Windows service called the Volume Shadow Copy service
-software VSS provider service is also included as part of Windows to be used by Windows applications
-requires the file system to be NTFS to be able to create and store shadow copies
-created on local and external (removable or network) volumes by any Windows component that uses this technology, such as when creating a scheduled Windows Backup or automatic System Restore point