Why my Only NAS is shown as NAS-2 in Finder
There is probably a “JBPersonalCloud” remnant in /Volumes directory. When you connect the NAS, the system sees that there is already a “JBPersonalCloud” and appends the “-2” for the newly connected NAS. 

Disconnect the NAS and delete the remnant with the Finder or Terminal then reconnect the NAS.

Finder:
Select “Go to folder...”, enter /Volumes and tap “Go”. This will open the Volumes folder in a window where you can delete the remnant. Simply drag it to the trash (you may need to authenticate).

Terminal:
Open Terminal.app and type

cd /Volumes
ls -la


This will show you the list of drives that are currently mounted. If you see the remnant it can be deleted with...

sudo rm JBPersonalCloud


It will ask for an administrator password.