savePath on live Sass Compiler

I am new to using live Sass Compiler in VS , after giving up to set up Dart Sass (and years using Ruby Sass)
My basic question is how to set up the css folder (different from my scss folder. In fact scss and css folders are siblings).
In settings.json I changed
“savePath”: null,
“savePath”: “/…/css”,

but Sass keeps compiling to scss folder … I know / refers to root, but, …where is root defined? Is it the folder where scss files seat?