Download folder as ZIP in api v2?

I may have a question in the same category or case! I use the premium version of Dropbox with my another business account with Dropbox. I am developing a portal for my client where I want to give my client an option to download bigger files like 5GB. So, what you think is it possible with v2 api to let my client download 5gb files at a time using direct download?

If no, what is the maximum limit of download zip at a time or how much file size can handle v2 api to download at a time?

Okay. I am sharing this code for people who needs to download dropbox folder as zip in C#. I can't find a solution in the web and I have to piece up my own code. Hope it helps.

private async Task Download(string foldername)
{
        string token = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
	var dbx = new DropboxClient(token);
	using (var response = await dbx.Files.DownloadZipAsync("/" + foldername))
	{
		Stream ms = await response.GetContentAsStreamAsync();
		Int16 bufferSize = 1024;
		byte[] buffer = new byte[bufferSize + 1];
		Response.Clear();
		Response.ContentType = "application/x-zip-compressed";
		Response.AddHeader("content-disposition", "attachment; filename=myfolder.zip");
		Response.BufferOutput = false;
		int count = ms.Read(buffer, 0, bufferSize);
		while (count > 0)
		{
			Response.OutputStream.Write(buffer, 0, count);
			count = ms.Read(buffer, 0, bufferSize);
		}
	}
}

//To call it, place the download function in a page_load of a aspx (example: download.aspx)
//Link example: http://domainname/download.aspx?folder=abc123  
//This link will directly download the folder as a zip file.

protected void Page_Load(object sender, EventArgs e)
{
     string dropbox_folder = Request.QueryString["folder"];
     if (dropbox_id == null)
        Response.Redirect("http://google.com");
     try
     {
        var DownloadTask = Task.Run(async () =>
        {
             await Download(dropbox_folder);
        });
        DownloadTask.Wait();
     }
     catch (Exception ex)
     {
         Response.Redirect("http://google.com");
     }
}

I am confused as to what the "version" is above this download_zip documentation (It says Version1 -- however it is on the Dropbox API v2 page.