1. Open Windows Media Player. 2. Click Organize at the top left of the screen. 3. Click Manage Libraries. 4. Select the library that you would like to add a folder to: [ Music, Videos, Pictures OR Recorded TV ]. 5.Click Add in the Music Library Locations dialog box.. Open Windows Media Player. 2. Click Organize at the top left of the screen. 3. Click Manage Libraries. 4. Select the library that you would like to add a folder to: [ Music, Videos, Pictures OR Recorded TV ]. 5.