Adding data to a QTreeWidget by Drag and Drop

I am trying to drag and drop a folder into a a QTreeWidget and it will print out all the files in that folder and any other folder structures under that. I am very unfamiliar with QTreeWidget and in my example I was just trying to add data under the ‘Name’ column everything I tried i got different errors from model is a private method to argument 1 has unexpected type 'Tree'. How can I add data under each column?

import os
from PyQt5.QtWidgets import QFileSystemModel, QApplication, QAbstractItemView, 
    QMainWindow, QPushButton, QTreeWidget, QTreeWidgetItem
from PyQt5.QtCore import *
from PyQt5.QtGui import *


class Tree(QTreeWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setAcceptDrops(True)
        self.resize(600, 600)
        self.setHeaderLabels(['Name', 'Size', 'Upload Status'])

        model = QFileSystemModel()
        model.setRootPath(QDir.currentPath())
        model.setReadOnly(False)

        self.setSelectionMode(self.SingleSelection)
        self.setDragDropMode(QAbstractItemView.InternalMove)
        self.setDragEnabled(True)
        self.setAcceptDrops(True)
        self.setDropIndicatorShown(True)

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls():
            event.setDropAction(Qt.CopyAction)
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls():
            event.setDropAction(Qt.CopyAction)
            event.accept()
            for url in event.mimeData().urls():
                if url.isLocalFile():
                    rootPath = url.toString()[8:]
                    if os.path.isfile(rootPath):
                        address = rootPath
                        item = QTreeWidgetItem()
                        item.setData(self, 0, 0, address)
                        self.addItem(item)
                    else:
                        for path, subdirs, files in os.walk(rootPath):
                            for file in files:
                                address = str(url.toLocalFile())
                                path = path.replace("\", "/")
                                directory_name = path.replace(rootPath, "")
                                displayName = directory_name + '/' + file
                                address += displayName
                                item = QTreeWidgetItem()
                                item.setData(self, 0, 0, address)
                                self.addItem(item)

        else:
            event.ignore()


class Main(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('Login Form')
        self.resize(1200, 600)

        self.treeBox = Tree(self)
        self.btn = QPushButton('Upload', self)
        self.btn.setGeometry(850, 400, 200, 50)


if __name__ == '__main__':
    import sys

    app = QApplication(sys.argv)
    w = Main()
    w.show()
    sys.exit(app.exec_())

For example if I drop a folder that contains file1, file2, subfolder, and subfolder2 the treewidget will display the root folder with each file as a child. Along with the subfolders in the root will also display their children(files inside the subfolder).