/Provider=ProviderNameOrID /For=ForVolumeSpec /On=OnVolumeSpec /MaxSize=MaxSizeSpec - Adds a shadow copy storage association ...

%1 %2 [/Provider=ProviderNameOrID] /For=ForVolumeSpec      /On=OnVolumeSpec [/MaxSize=MaxSizeSpec]     - Adds a shadow copy storage association between the volume specified by      ForVolumeSpec and the volume specified by OnVolumeSpec the shadow copy      storage volume.  Storage for shadow copies of ForVolumeSpec will be      stored on OnVolumeSpec.  The maximum space the association may occupy on      the shadow copy storage volume is MaxSizeSpec.  If MaxSizeSpec is not      specified, there is no limit to the amount of space that may be used.  If      the maximum number of shadow copy storage associations have already been      made, an error is given.  MaxSizeSpec must be 1MB or greater and accepts      the following suffixes: KB, MB, GB, TB, PB and EB.  Also, B, K, M, G, T,     P, and E are acceptable suffixes.  If a suffix is not supplied,      MaxSizeSpec is in bytes.  If the provider is the supplied Microsoft      provider, MaxSizeSpec must be 100MB or greater.     - The provider ID can be obtained by using the List Providers command      When entering a Provider ID, it must be in the following format:        {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}      where the X's are hexadecimal characters.      Example Usage: vssadmin Add ShadowStorage                              /Provider={b5946137-7b9f-4925-af80-51abd60b20d5}                             /For=C: /On=D: /MaxSize=900MB