Browse through your computer and find the file, then click "upload" and the file will begin uploading. Songs not uploaded will have grey numbers, uploaded songs will have green numbers:
VERY IMPORTANT: These are large files and can take many minutes—even hours—to upload, depending on your internet connection upload speed. Please be patient.
VERY IMPORTANT: You are finished ONLY when ALL songs have had a music file uploaded and the number of the track turns green on the Your Album or My Discography page: