Using Download CSV Mapping File Button, you can download only the CSV mapping file without downloading the files/attachments. 

Follow the below steps to download CSV File- 

1- Go to Mass File Download App.

2- Select Mass FIle Download Tab.

3- As per the requirement select the sub-tab and search for the records, Once the records search is completed.  Click on the Download CSV Mapping File button. 

Additional Note - Download CSV Mapping File button is available in all 4 subtabs:

a) Related Files & Attachments

b) Documents


c) Static Resources


d) My Files & Library Files