What is the difference between an item and file? (Original)

An Item is a generic content type that allows you to insert text, an image, a web or video link, or an uploaded file into your course. A single Item can include both edited content and attachments.

A File is a content type that allows you more control over the behavior of files uploaded from your computer. The File type only permits a single attachment (no written content or web links) but allows you to determine whether the file is displayed within the Blackboard page or displayed in a separate browser window.