Background
I am designing a tree structure that should represent folder nesting and contain some properties inside. On the left side of the screen, I have a tree structure with folders and on the right, I display the table with properties.
The problem
In our case, it is very likely that some of the folders are going to be very deep (The screenshot is a very edge case which we still have to keep in mind). I had an idea of a resizable tree area to a certain point but for now we don't have the opportunity to add "drag" function.
Also, because we're already using the breadcrumbs and tabs on the screen, in my opinion having second elements like this might be not very clear.
Question
Is there any other way to organize/show this deep tree structure? Maybe there are some products where I could see that deep of a structure (but not Windows/OS because they're using the whole content area)?

