Drive for Samsung Galaxy S5 doesn't show in any laptop
I have the same problem and it is likely related to the device settings on the phone and your version of Android.  I started having a similar issue when I updated from 5 to Android 6.0.1.  When a USB is connected, your phone is likely in Charging only mode so it shows up on the pc but the drives are not visible.  Unlock developer mode and change the USB setting to MTP. See if that helps.

I am able to swipe down from the top screen when connected and change it to MTP since it seems to default to charging only once the screen goes into lock mode.

Hope this helps!
Good luck.