I have a NAS/Network Attached Storage drive, WDC 1TB, plugged into my Router via an Ethernet cable. It shows in the Network section of the left panel in Windows Explorer [File Explorer on Win8/8.1]. There is a Public Folder on the drive and I just dragged that Folder over to the left panel onto the Computer icon on each computer, shows at the bottom of the drives list. Double-clicking that drive letter opens that Folder. My WinVista, Win7, Win8, Mac OS X and Linux computers have no problems accessing the data. The upside to a NAS is not requiring any particular computer be on for it to be accessed from the others through the Router, either Wired or Wireless/Wi-Fi. My Mac has no problem reading or writing even though it is formatted as NTFS and there's no NTFS program on the Mac.
By Default Windows maps drive letters for network drives beginning with Z: and moving up the alphabet.