If you have many files attached to your tasks, then you can download or delete several of them one. 
How to download multiple files at once

- Click on a task to view more information about it 
- Then click on the attachments tab 
- Hover over each task, and select it in the left top corner 
- Click on the download button 
How to delete multiple files at once

- Click on a task to view more information about it 
- Then click on the attachments tab 
- Hover over each task, and select it in the left top corner 
- Click on the delete button 
 
                