Brand new user help please!

[TheAtticStudio]

Hi all,
Please excuse my lack of knowledge...
I am totally new to this so here goes.

I have a Seagate 5tb PersonalCloud NAS drive that I have a ton of music, files etc backed up on.
I've been advised to take a look at installing a music server so that my Linn Majik DSM can stream from. At the moment, files are all over the place and the Linn App isn't showing new folders I'm adding.

I have no idea how to make this happen or whether I have the correct information.

Any help greatly appreciated.

Thanks!