Best way to organize all the sheets of paper??

Wondering what other folks out there do to keep track of all the sheets of paper / sketches. I’d imagine I’m more random access than most - commonly leaving projects to sit for weeks/months before going back to them… Organization is becoming a problem.

Do you guys file these, or just scan everything from the get go?

Sketches all go into these by product, easy to rework or scan later, various size to fit projects with less or more paper.