It has nothing to do with shares as the structure listed above is on the Hub itself not a network drive or similar.
There is no way to set the level at which the hub ‘enters’ the folder structure as when it sets up the Media library it will add any folder that contains files of the type you are selecting.
For instance, I could have the following from the root of the hub:
My Music
MP3
Kings of Leon
Youth and Young Manhood
cover.jpg (as a file)
My Photos
Family
photo1.jpg (as a file)
Friends
Holidays
Wedding
My Videos
Comedy
Kids
Hollywood
TV
Dexter
DexterS01E01.jpg (as a file)
If you select the Photo category of the hub menu you will see the following folders and files:
My Music
MP3
Kings of Leon
Youth and Young Manhood
cover.jpg (as a file)
My Photos
Family
photo1.jpg (as a file)
My Videos
TV
Dexter
DexterS01E01.jpg (as a file)
Empty folders are not displayed but ANY folder that contains a supported picture file will be regardless of where it is on the disk. This is because you have selected the Photos menu option on the hub
It would be great to be able to set the start level of each TYPE that the hub distinguishes between i.e. Photos, Music, Videos. So in my case I would want to set:
Hub menu option Hub folder
------------------------ --------------
Photos My Photos
Music My Music
Videos My Videos
This way, when I select Photos on the hub, all I would see is:
My Photos
Family
photo1.jpg (as a file)
Unfortunately it is not currently possible to do this.