Hello ramohi,

NFS shares are thin provisioned.  As space is needed it will increase in size till it reaches it max available configured space.  Here is a link to EMC Unity Family Configuring NFS File Sharing which has some additional information as well.  https://dell.to/3JoAO34

Here is also a link to Unity info hub which has some additional white papers and guides as well. https://dell.to/3FajbkW