Question: how to transfer files from mac to pc using usb cable?
Answer: On a Mac-to-PC USB cable, the connection plugs are the same on both ends, so it doesn't matter which plug is connected to which computer. Plug one end of the 6-foot cable into a USB port on your Mac.
Plug the second end into a USB port on your PC. ... 
Drag and drop your files from computer to computer.