New
#1
Unless I've misunderstand your suggestion, it doesn't work.
Drag a HD location to create a link in Pictures & it also appears in Music.
I don't know if this will help, but the way that I always set my file locations is by clicking on the file icon in the task bar, on the top should be files for videos, pictures, music, downloads, etc. Right click on a file icon, music for example, scroll down to properties, click on properties and open file location. Click on the tab that says location and there will be a screen that says where the files are and right in the middle there is an icon that says MOVE. Click on move and you can set where you want those files to be stroed. You can do this with each type of media separately.