ITunes music library in a bit of A MUDDLE.

I have a new windows computer with ITunes installed. By default my music is being saved in ITunes/Media/Music. I wanted this redirected to an external hard drive. Which I have done. I have named this folder as 'My Music' but I have noticed that though there are loads of separate artists with their albums in 'My Music' I have another folder called 'Music' which is a subfolder of 'My Music' and this is about 80GB and contains loads of artists and their music. I'm not sure if this is a legacy folder but the artists and their music are required and appears to work safely with ITunes. My question is 'Can I move these individual artists and their music out of this subfolder and place it higher up (within) the main folder called 'My Music'?' I would assume this will flag up any duplicate entries? And I will remain with a single folder called 'My Music' on my external hard drive? I don't want to corrupt anything. Thanks in advance for any assistance offered. JD