Re: why my laptop can't see my samsung note 4 edge
Hello. Try Samsung Smart Switch for pc (you won't need the app as you are not switching from an old phone). It should load the latest drivers.
Also if you have a secure screen lock it won't read it, so swipe or none only for the Lock Screen setting.
It won't appear as a drive number any more apparently, after KitKat, but you can browse it as normal as a Portable Media Player.
Other considerations: you may be using a different one way cable, or the usb port is faulty.