Since it is a .rar file, standard Windows or Mac folders won't open it natively. You will need a decompression tool: (Windows) 7-Zip (Free/Open Source) The Unarchiver (Mac) ⚠️ Important Safety Note
Right-click the file and run a scan with Windows Defender or Malwarebytes. Download File Military Truck Concept.rar
Once extracted, be wary of any .exe or .scr files inside if you were only expecting 3D models or images. Since it is a
Technical drawings for engineering or 3D printing. Since it is a .rar file