From Gigantic Wiki
This template will mark file with CC-BY-SA license and will add it to Category:Files under CC BY-SA license.
Template uses Extension:TemplateStyles; for styles see Template:License/styles.css.
In case the file is already uploaded, type {{CCBYSA}} on file information page.
In file upload page choosing "It's under CC BY-SA license" option from licensing dropdown will insert template automatically.