Media is the images, video, recordings, and files, you upload and use in your blog. Media is typically uploaded and inserted into the content when writing a Post or Page. Note that the Uploading Files section in the Settings Media Screen describes the location and structure of the upload directory.
The Media Add New Screen allows you to upload new media to later use with posts and pages. Adding media can simply be “dragged and dropped” or searched with the “Select Files” Button.