For beginners, saving a PLY 3D model involves finalizing your model, using File > Save As/Export, selecting PLY format, adjusting basic settings, and choosing a save location.
Finalize first: Fix simple errors (e.g., non-manifold edges) to ensure the PLY file is valid. Most tools—like Blender (look for "Stanford (.ply)") or Meshlab (select "PLY" in Save As)—include PLY as a common option. Adjust settings: Pick ASCII for small, editable files or binary for faster loading of large models; keep vertex colors/normals if you need those details. Choose a familiar folder so you can find the file easily.
If you’re new to Blender, go File > Export > Stanford (.ply)—it’s straightforward. Start with ASCII to practice, then switch to binary for bigger models once you’re comfortable.