Files named "cnc.rar" downloaded from forums, file-sharing sites, or unofficial sources can be high-risk. Before opening:

: Only download files from reputable forums like OpenBuilds or official GitHub repositories.

: Always use updated antivirus software to check the archive.

: It is a standard way to package 3D models (like STL files for 3D printing ) or vector drawings (DXF/SVG) for CNC routing.