I marked the top of my memory sticks,ie which way up they should be inserted with a red CD marker pen after I buggad up one of the front USB sockets in me old puter case,I have four mem sticks only one has light on the top but it dont come on until it is plugged in which is stupid,all of them are featureless so without looking at the plug end there is no way of telling specially if your groping around the back of a desktop case
