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?

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