# Data Object - CnsFileBackingDetails(vim.cns.FileBackingDetails)

Extended by
  CnsVsanFileShareBackingDetails
Extends
  CnsBackingObjectDetails
Since
  vSAN API 7.0

## Data Object Description

Details for a file type backing for container volume.
This class will be used as input at the time of volume creation and will also be returned as part of query result to give more information about a container volume.

Properties

Name | Type | Description
--- | --- | ---
backingFileId* | xsd:string | At the time of creation this field would identify the existing file share that should be used to back the container volume. This field is optional and when not specified, a new file share will be created to back the volume. When this field is present, capacityInMb and storage policy fields will be ignored.
Properties inherited from CnsBackingObjectDetails
capacityInMb
Properties inherited from DynamicData
None

*Need not be set
Show WSDL type definition
<complexType xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vsan="urn:vsan" name="CnsFileBackingDetails"> <complexContent> <extension base="vsan:CnsBackingObjectDetails"> <sequence> <element name="backingFileId" type="xsd:string" minOccurs="0"/> </sequence> </extension> </complexContent> </complexType>