Adding sub folders on Synology

[sph2701]

Hello All,
This is all new to me, so my advance apologies if this has been covered..

I now have two Synology nas drives, the DS112J.
The first is up, running and perfect with Minimserver.
It has exactly the file structure I want, and the apps I use for the electronics all work just fine with it.
The file structure has a main folder called Music (obvious) and inside that are sub folders of cd rips, 24bit, DSD, OST, etc etc.
I even managed to add a folder called Christmas Music a month back.

Problem is that it is completely full..

So I purchased a new one, with a 3Tb drive this time
With the help of the tutorials here I have minim server up and running, I have the main folder called Music, to which I uploaded a WAV converted to FLAC in DB power amp.
It streams perfectly.
So I *know* I have something correct.
I have spent nearly three days trying to add sub folders to that main folder, and have reached the point of very nearly picking up the hammer.
I can create folder after folder, and add music to them, but then need to change where minim looks for that music (its location)

If anyone has any idea what to do here I would really appreciate the help.

The obvious question - why not do what you did before?
Well, lets just say a dear friend set this up for me, and is no longer available for help.

Thanks in advance.
Steve.