NAS Assesment detailed excel

Hi , 

We ran the storage Assessment for our SAN and NAS storage frames and we got the detailed ppt presentation . 

For SAN along with PPT we were able to pull the excel sheet where is has the complete details about lun / port usage or not connected . It is something like the over view of complete storage frame . 

But where as for NAS we dont have an option to pull the details for excel . 

PPT for NAS assesment gives me the details like when the how many files accessed 4 years back / 3 years back like that , but it didnt give an over view from which NAS share they were not used .

SO we wanted to know is there a way how to get the details of from each NAS share when the data was last accessed like that report ?