Shadow Copy (also called Volume Snapshot Service or VSS), is a technology included in Microsoft Windows that allows taking manual or automatic backup copies or snapshots of data, even if it has a lock, on a specific volume at a specific point in time over regular intervals. It is implemented as a Windows service called the Volume Shadow Copy service. A software VSS provider service is also included as part of Windows to be used by Windows applications. Shadow Copy technology does not require the file system to be NTFS, although it needs one NTFS volume for the shadow copies to be stored.
commands:
vssadmin list providers
vssadmin create shadow /for=c: