Folding doors occupy less space than the typical hinged door.
The folding door differs from its sliding counterpart in the fact that it is always visible and not “hidden” inside the wall. It is also very useful for anyone who has only limited space, because it is less cumbersome than a leaf door.
This means you can pass through without taking up valuable space against the wall. A sturdy system of pins and hinges makes the door fold in on itself, just like a book.