This is a box/rack for hanging folders. One element printed 4 times + 2 brackets and some bolts and you can store folders on your desk.

Printing:
lightweight version - total ~400g
- 3 walls
- 3 bottom leyers
- 0 top layers
- wall 0.4mm
- layer height 0.3mm
- lines infil 15%
 

No support needed

regular version - total ~ 600g
- 4 walls
- 3 bottom leyers
- 3 top layers
- wall 0.4mm
- layer height 0.3mm
- lines infil 15%

Bolts:
8x M3x8 
8x M3 square nuts
16x M3 washers
4x M3x45
4x M3 hexnut