I purchase these storage bins every year. They are just the perfect size and come with a locking lid and they’re stackable. Highly recommend them. The price was great as well.
These work well with hanging file folders. They stack nicely but don't stack them too high or they'll warp. Be very careful handling them in the cold too because the plastic becomes brittle and will fracture easily. At over seventeen dollars if purchased in store these are too expensive in my opinion but they do work and they do hold up better than cardboard.