Add New

Add New allows a user to add a new files. To add a new files select “Add New” under Media menu or next  to Media Library as shown in this image.

Media-Add_New

Once “Add New” is selected, the “Upload New Media ” page will be displayed. Here you can add new files by dragging and dropping files or select files by location.

Upload_New-Media

Drag and Drop

To Drag-and-Drop open the folder with the files you want, select the files, then drag them over to the Drag Files Area as shown in this image.

Drag_And_Drop-Files

Select Files

You can use the Select Files button to open a folder, navigate to the files you want to add, select the files, then select Open.

Select-Files

For acceptable file types check this link: http://en.support.wordpress.com/accepted-filetypes/.