I used this for years to mount my nas (an usb on my router) on fstab.
//fritz-nas/fritz.nas/PENNA_USB/FRITZ/NAS /media/NAS cifs username=myuser,password=mypassw,uid=1000,gid=1000,sec=ntlmv2,iocharset=utf8,vers=1.0 0 0
Some day ago i updated my pc to the las linux mint, and now i can't copy...