I used these to categorize my personal papers. Then I used file folders for each account. I had to trim a bit off the edges of the file folders to get a perfect fit. Now I can find just what I'm looking for in very short order.
I was using single hanging files that always slipped off of the hangers because they were over loaded. When I tried these expandables It was a revelation. Now my files even while overly full remain firmly on the slides in my drawer.
I was hoping to be able to fit several standard letter-sized folders full of papers into these. The accordion folds on the sides make it hard to fit file folders inside easily. You have to sort of ease them in and MAKE them fit between the folds.