This is a magazine file (for A4)
from plywood or acrylic glass.
The six box-pieces are distributed on four CAD-Files (dxf), each fitting on A3. The pieces, once cut, can be fitted together manually. You should be able to tell from the foto where each piece belongs.
The box needs no glue if it just stands on your shelf most of the time.
Build it together first without glue, even when you plan to glue later, just to check.
When often handled or your sheets are not very level consider gluing the box. Disassemble your box again. Put small amounts of glue between the edge teeth before plugging it together.
If you want to develop other boxes of different sizes or different
material thicknesses check out MyBox on sourceforge
This program produces a generic box design which can be refined manually
(as in this case to a magazine file) I have built my design using the lasercutter at Happylab (www.happylab.at), where it is documented as well.