Mac says I have 11 GB's of music when I actually have 7?

I'm new to mac. I'm getting used to everything. I looked in my storage & it says that i have 11 gb's of music when i only have 7 on my iPhone. I have a music folder in my documents section filled with all of the music that is on my iPhone & it's around 7 gbs added up. Thoughts?

Do you keep all music files in this location?
/Users/your home folder/Music/iTunes/iTunes Media

If not, it has hidden music. Search for.mp3 and.m4a
When you find music files that are scattered in different places, that explains it. Put them all together.

In all honest truth, this isn't related to Mac OS. This question of "How come I have more reported music that I really do?" is a Windows deal also.

I'm hoping for the next version of Mac OS, Apple will remove that Storage graph entirely. It is just a worry thing. If it is wrong, there's nothing you can do to make it change the amount it shows. If it is correct, well, you just have music all around.

IF you allowed iTunes to "organize" your music collection
it typically creates a "Shared" file in the C:\Users\Public file path.

I put "Organize" in quotes because it seems that whatever the definition of
that word that Apple is using it appears in the dictionaries in the entire word
except in Apple's Corporate offices.