def _walk_filesystem(self, target):
'''
Get file size and modified time for all files from the target directory and
down.
'''
spin = Spinner()
spin.hide_cursor = False
for root, dirs, files in os.walk(target):
dirs = self._filter_dirs(root, dirs)
for name in files:
filename = os.path.join(root, name)
file_data = self._get_file_data(filename)
self.file_count += 1
self._show_activity(spin)
self._process_files(file_data)
self._add_up_dir(root, file_data)
self._sort_dirs()
