Select the Add button in the upper-right corner, then choose Upload Files.
Drag and drop local files from your PC into the designated area or click within the shaded area to open a file browser. When all files have finished uploading, select OK.
Select the playlist where you want to add content. If you're scheduling content to multiple playlists, select any one of them to start.
Select Schedule Content.
Choose your media files and select the Continue button to access the Media Library.
Check the box for each piece of content you wish to add; selected rows will be highlighted. When you're ready, click Continue. Note: The Continue button will remain disabled until at least one item is selected.