When neither a plus sign or a minus sign appears to the left of a drive or folder in Windows Explorer it means?

When neither a plus sign nor a minus sign appears next to a drive or folder in Windows Explorer, it indicates that the item is neither expanded nor contains any subfolders or files that can be expanded. Essentially, it signifies that the item is at its default state, showing that there are no additional contents to view. If a plus sign were present, it would mean that the folder can be expanded to reveal its contents, while a minus sign means it is currently expanded.