Ionic inappbrowser not able to download file

Ionic Framework Ionic Angular
1

Below is my code which opening weburl in inappbrowser but when i click on download button i am not able to download my .PNG file or.PDF file

ionViewDidEnter(){

    this.launchSite()

    this.subscription=this.platform.backButton.subscribe(async ()=>{

      navigator['app'].exitApp();

    })

  }

  launchSite(){

    let target = "_blank";

    this.platform.ready().then( () => {

    var browser=this.inAppBrowser.create(this.stagurl,target,this.options)

    })

  }

ionic info

Ionic:

   Ionic CLI                     : 6.18.1 (C:\Users\Cloud\AppData\Roaming\npm\node_modules\@ionic\cli)
   Ionic Framework               : @ionic/angular 6.0.13
   @angular-devkit/build-angular : 13.2.6
   @angular-devkit/schematics    : 13.2.6
   @angular/cli                  : 13.2.6
   @ionic/angular-toolkit        : 6.1.0

Cordova:

   Cordova CLI       : 11.0.0
   Cordova Platforms : android 10.1.1
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 5.0.0, (and 4 other plugins)

Utility:

   cordova-res : 0.15.4
   native-run  : 1.5.0
2

If you can use capacitor instead of cordova then its very easy to download whatever using Capacitor filesystem