Student Files File Editing ...
How do I delete a file?
Files that are included in your portfolio cannot be deleted from the Files storage area until you remove it from any portfolio element you have included it in. [TIP: For a quick way to see where a file is located, go to the Files storage area and click on the Details link. The description will let you know in which portfolio element(s) the file is contained.]
Go to each element the file is stored in and remove the file by checking the box next to the file name and clicking on "Remove Selected File(s)" button. Then, to permanently delete the file from the system click on the Files tab, click on the box next to the file type and click on "Remove Selected File(s)."