Sublime Text 3 C++ build system for mingw-w64

MinGW-w64.sublime-build

{
    "cmd": ["g++", "-o", "${file_path}/${file_base_name}.exe", "-static-libgcc", "-static-libstdc++", "*.cpp"],
    "file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$",
    "working_dir": "${file_path}",
    "selector": "source.c, source.cpp, source.c++",
    "path": "c:/Program Files/mingw-w64/mingw64/bin",
    "shell": true,
    "variants": [
        {
            "name": "Run",
            "cmd": ["g++", "-o", "${file_path}/${file_base_name}.exe", "-static-libgcc", "-static-libstdc++", "*.cpp", "&", "${file_path}/${file_base_name}.exe"]
        }
    ]
}

Why use -static-libgcc and -static-libstdc++ options?

Also, I think *.cpp should be ${file}. Am I right?

Would be possible to in any way add a PATH command so ST could compile using Ming installed in a USB Flash Drive?

It returns:
C:...\ld.exe: cannot open output file
C:\Users...\s.exe: Permission denied