Galaxy S6 Edge is the most recent release by the Samsung with curved display for the first time so if you got one and need to connect to PC for transferring data or photos etc you need usb drivers and also for performing adb tasks you need adb driver. You can download Galaxy S6 Edge ADB and USB drivers from below link.
Samsung Galaxy S6 Edge USB / ADB drivers
USB Drivers for Mobile Phone for Windows
Supported Operating System
Windows XP / Windows 7 / Windows 8 / Windows 8.1 / Windows 10 both 32 and 64 bit