Logic files storage location

Hello,

I am trying to locate the Logic project files location on my drive.I find all my songs on the 'document' folder but I don't see a Logic folder which holds these songs,although each time I save a recording project it goes to the Logic folder.

Also I would like to know if the document folder is an appropriate folder to store Logic projects.My Mac seems a bit slow these days & crashes when too many plugins are loaded.It used to perform better in the past.