my s6 edge having a usb connection problem and overheating

hey guys,
when I connect my phone to my laptop by usb conn.
it gives me connected, few seconds later it's not
bad problem, I can hardly transfer file between my laptop and my phone
I noticed the problem after the lollipop 5.1.1 update
I checked the usb cable on another device it works well
and another problem is overheating
when I put the phone to charging it overheats even if I'm not using

what to do !
my model is g925fxxu2bofj