final sourceFile = await File('/storage/emulated/0/Myfolder/image.jpg');

final newFilePath = await File('/storage/emulated/0/NewFolder/image.jpg');

​

moveFile(sourceFile, newFilePath);

​

Future<File> moveFile(File sourceFile, String newPath) async {

  try {

    // prefer using rename as it is probably faster

    return await sourceFile.rename(newPath);

  } on FileSystemException catch (e) {

    // if rename fails, copy the source file and then delete it

    final newFile = await sourceFile.copy(newPath);

    await sourceFile.delete();

    return newFile;

  }

}