my samsung ADB driver works fine...and it always has since I got the phone and installed the drivers...So today I plug my phone up to the computer to try and transfer some stuff to it and I find out that the "sd" folder won't open...so I open up my device manager and see the N:\ not working under "portable devices". I've never had this problem before and just searched google for like 20 mins trying to find a fix for this. anyone else have this problem happen or know how to fix it?

when I try and update the driver it tells me the best one is already installed.