Where is the settings file located?
The settings.xml is found in C:\Users\[YourWindowsUsername]\Documents\Rockstar Games\GTA V
The settings.xml is in (Copy-paste): %USERPROFILE%\Documents\Rockstar Games\GTA V
I store my profile on a different drive.
USERPROFILE is a system environment variable pointing to a user's profile directory (Settings, Documents, Music, Photos, Desktop) More:%USERPROFILE%