Download file from url save to phones storage. Basically, this is how you should use the package. There is a detailed long example in the link.
final taskId = await FlutterDownloader.enqueue(
url: 'your download link',
savedDir: 'the path of directory where you want to save downloaded files',
showNotification: true, // show download progress in status bar (for Android)
openFileFromNotification: true, // click on notification to open downloaded file (for Android)
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