[VB][HELP] Read Subfolder in saves and profiles

I'm trying to create my PackageManager and I wanted to implement the function to read / write the files contained in the subfolders. For now I can correctly read all files and folders in the root. How do I read the files in subfolders? This is the code I am using:

Code:

Dim STFS As New STFSPackage(File, Nothing)
		For Each Folder As STFS.FolderEntry In STFS.FolderDirectory
			Dim nodocartelle As New Node()
			nodocartelle.Tag = Folder
			nodocartelle.Name = Folder.Name
			nodocartelle.Text = Folder.Name
			Node1.Nodes.Add(nodocartelle)
		Next
		ListViewEx1.Items.Clear()
		MsgBox(STFS.FileDirectory.ToString)
		For Each Entry As STFS.FileEntry In STFS.FileDirectory
			Dim salvataggio As New ListViewItem()
			salvataggio.Tag = Entry.GetPath
			salvataggio.Name = Entry.Name
			salvataggio.Text = Entry.Name
			salvataggio.SubItems.Add(Entry.Size.ToString)
			ListViewEx1.Items.Add(salvataggio)
		Next