To make the paperclip icon for file attachment a hyperlink, see below steps:
1. Navigate to List > Support > Cases.
2. Choose one case > Edit.
3. Navigate to Communication.
4. Click Customize View button.
5. Click More Options button.
6. From the Results tab > add Formula (Text) and under the Formula column add:
7. Enter search name in the SEARCH TITLE field.
8. Click Save.
9. From the Case Record, go to Communications tab > in the View menu select the custom view created (the custom search).
10. Users also see an additional column with the word Download.
Expected Result: Click the Download link to download attachment(s).