Seriously. How often do you need to find mail that you have filed? Once a month or so? How often do you need to file mail? Much more often. Optimize for many

Seriously. How often do you need to find mail that you have filed? Once a month or so? How often do you need to file mail? Much more often. Optimize for many writes and few reads. Just throw everything in a box in chronological order. Everything will be easy enough to find and VERY easy to file. The most you should do is have a couple of boxes for broad categories of stuff to file.