Question: what is the square port on laptop?
Answer: USB 2.0. Also Known As: High-speed USB, USB 2 Description: Capable of transferring data at up to 480 Mbps, USB 2.0 is the most common speed of USB and works effectively with the majority of peripherals. A USB 2.0 port can come in a variety of shapes, including Type-A (rectangular), Type-B (square), mini or micro USB.