Question Can i create a directory in Hololens 2?

Hello everyone,

I have a project that needs to download files and load them locally in my Hololens 2. I try to create a directory with the following code:

Code (CSharp):

1.         string path = Application.persistentDataPath;
2.         debug.text = path;
3.         if (!Directory.Exists(path))
4.         {
5.             Directory.CreateDirectory(path);
6.             debug.text = "success";
7.         }

but don't work.
My question is, can I create folders or directories in my hololens 2 and download files there?? and whether is possible, where could I find an example of directory creation??