Get to the / platforms / android / res / raw / Ionic Native File folder?

Good evening, I'm trying to get to the folder of my ionic app / platforms / android / res / raw /

But I'm finding it very difficult for this.

I'm trying to do this:

this.file.checkDir('/platforms/android/res', 'raw')
.then(_ => console.log('Directory exists'))
.catch(err => console.log('Directory doesn\'t exist'));

I am searching for hours and can not find a way to do this.