How to Mount NAS in WSL
Windows Explorer right-click NAS folder to "Map Network Drive" and assign as X.
C:> wsl
ehowton@WSL:~$ sudo mkdir /mnt/x
ehowton@WSL:~$ sudo mount -t drvfs X: /mnt/x
ehowton@WSL:~$ cd /mnt/x
ehowton@WSL:/mnt/x$
C:> wsl
ehowton@WSL:~$ sudo mkdir /mnt/x
ehowton@WSL:~$ sudo mount -t drvfs X: /mnt/x
ehowton@WSL:~$ cd /mnt/x
ehowton@WSL:/mnt/x$