In the Studio in London we use A4 box files with nice printed lables on the edge. I was looking for that kind of thing in A3/11x17 but never came across such a thing.
In the paper days (now we use mostly PDF files) we used to have a lot of these:
To my astonishment I found that they still make them but I would guess that used ones would come rather cheap. Paperless workflows have spread, and office space is expensive.
Yeah… I have been doing a lot of remote freelancing over the last 5-6 years for the studio but I now have more of my own clients here in Montreal and come away from meetings with a load of scribbles on paper. A lot of these bits are precious reference. I could scan them, but then I’d need to print them again for the next meeting.