For android, the following code should work,

```

ReactNativeBlobUtil.config({

fileCache: true,

appendExt: 'pdf',

path: `${dirs.DocumentDir}/${fileName}`,

addAndroidDownloads: {

useDownloadManager: true,

notification: true,

title: fileName,

description: 'File downloaded by download manager.',

mime: 'application/pdf',

},

})```

The download manager should be responsible for downloading the file.