Expandable A4 Tray

Designed this expandable A4 tray so that one can print as many as needed.

The size of this model is small so you should adjust your own need and make sure your printer can print up to the size you prefer. The size I printed to contain A4 files is 350mm x 250mm, and the height depends on your need, mine is 150mm.

I printed this by using 20% infill, and 0.2mm layer, and the result is great. I suggest using a larger support like 0.6mm when you print the A4 size, it's easier to take the support out.

The tray connection can be a bit tight, so the next version can improve this bit.