ok so it took me a sec to realize I had to put my finger over the holes to get a hit on some of my carts other than that it is great.Do you all unplug these every time ?? my usb is on the back of my computer is why I ask I have one on the front but my fatherinlaw put a new one on that is in the back that i guess is better than the ones on front or do you think it matters what one I use obviously I dont know much about computers