USB Connection problem and rooting

Hi! Whenever I connect my SHIELD tablet to my laptop (WIN 10) it charges but never appears on my computer/PC. I tried using unchecking the option on the settings and rechecking but no luck. So do you guys know hot to fix this? Also, I kind of get how to start rooting the tablet but there's a missing information that I can't seem to get. Can you guys point me to the right direction? Will be rooting first time, by the way