Cordova FileTransfer plugin is working in phonegap but it doesn't work on android -

cordova filetransfer plugin working in phonegap emulator installed in android device doesn't work on android emulator or in device when generate , install apk.

here code.

function download_pdf(pdf_link) {          var url = "http://fakepath.com/app/pdfs/"+pdf_link+".pdf";          var encoded_url = encodeuri(url);          var filetransfer = new filetransfer();          var folderpath = "file:///storage/emulated/0/download/";          var filename = pdf_link+".pdf";          var fileurl = folderpath+filename;          filetransfer.download(             encoded_url,             fileurl,             function(entry) {                 var message = pdf_link+".pdf has been downloaded downloads folder.";                 navigator.notification.alert(message, alertdismissed, 'download successfull', 'thank you');             },             function(error) {                  navigator.notification.alert(fileurl+" || there error in downlaoding file, check internet connection or try again later.", alertdismissed, 'sorry', 'ok');             },false,             {                 headers: {                     "authorization": "basic dgvzdhvzzxjuyw1lonrlc3rwyxnzd29yza=="                 }             }         );     } 

i digged more this, cordova.file.externalrootdirectory+"myappfolder/"+filename; not working cordova.file.externaldatadirectory+filename; working fine. need save files sdcard/appfolder not in android/data/com.app/files.