Music (MP3) Files Issue

Hi.. First post here - this is all very, very new to me so please excuse any 'rookie errors'
I have a Sony Bravia KDL-40CX520 which has a wired connection to my router, my PC is connected wirelessly to this same router.
I have two dedicated external hard drives with music files on all connected to my PC . The music files are sorted into year of release on these hard drives so there are folders for 2011, 2010, 2009..etc..)
My Sony TV see Serviio ok, and the two hard drives but when I go into the hard drive it only sees a couple of the folders (i.e. it only shows 2010 and 200 not 2011 ..etc...) There is no difference at all between what is in them so I don't understand this.
If it didn't show any of the folders then I would know I was doing 'something' wrong but by showing some I know I must be doing 'something' (at least partially) right!
Anyone got any ideas what might be causing this?
I have a Sony Bravia KDL-40CX520 which has a wired connection to my router, my PC is connected wirelessly to this same router.
I have two dedicated external hard drives with music files on all connected to my PC . The music files are sorted into year of release on these hard drives so there are folders for 2011, 2010, 2009..etc..)
My Sony TV see Serviio ok, and the two hard drives but when I go into the hard drive it only sees a couple of the folders (i.e. it only shows 2010 and 200 not 2011 ..etc...) There is no difference at all between what is in them so I don't understand this.
If it didn't show any of the folders then I would know I was doing 'something' wrong but by showing some I know I must be doing 'something' (at least partially) right!
Anyone got any ideas what might be causing this?