thingiverse
Storage Boxes by tomjrsmart fixed...https://www.thingiverse.com/thing:1713304
One of the corners of the small box was missing a fillet (rounded edge) - Fixed in Tinkercad.
The boxes are designed to fit inside each other but found its a very tight fit. You may want to scale down the medium and small boxes 1 or 2%
Direct link to the original creator's page
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.