Phone connected to PC but it only charges I'm using windows 10. Connected my phone (Samsung Note 3) to my PC but it only charges. I've done USB Debugging and even installed the driver on my PC. I doubt windows 10 doesn't recognized my phone because I connected to my windows 7 PC but the same thing happened.
Not all the USB cables offer data transfer. There are same-looking power-only cables, which obviously allow only charging, and don't have data wires at all. 

Try with a different USB cable as a start.