Ionic 2 file plugin : how to create file in ionic 3

Question

I am trying to create a file in my phone but I am always invoking only else part

app.component.ts

file.checkDir(file.dataDirectory, 'silapathigaram')
      .then(_ => {
        console.log('Directory exists');

      })
      .catch(err => { 
        console.log('Directory doesnt exist');
        file.createDir('cordova.file.applicationDirectory', 'silapathigaram', false)
        .then(
          (files) => {
            // do something
            console.log("success");
          }
        ).catch(
          (err) => {
            // do something
            console.log("error"); // i am invoking only this part
          }
        );
       });

what am I doing wrong? I am checking file name 'silapathigaram' and if it does not exist I am trying to create one

but I am invoking only error part my code

Answer 1

while creating the directory use code

file.createDir(file.externalRootDirectory, 'silapathigaram', true).then((val) => {
      console.log("Created");
    }).catch(e => {
      console.log("error is ",e);
    });