I believe you will have to do that from a command line. It requires just three command lines; The last one in an editor like vim (run from the terminal) you will have to be in root mode so use the sudo (super user do) in front of the command ie: sudo vim /etc/fstab
to edit /etc/fstab. Do a search for adding a drive to linux. Read... it's worth it.
I did it as a novice in about an hour. Now I can do one in about 3 minutes (not counting reboot time and format time).