How to delete a file after uploading it under /admin/content/media?

Hello,

I uploaded a pdf file under /admin/content/media. Now it is listed under /admin/content/files and I would like to delete it forever. How to do this? It looks like I can just click on the file to open it but I can't select it for doing any changes to it nor is there some kind of menu to interact with this entry.

I'm running Drupal 8.4.4.

Best Regards!