And it's not 1.7tb it's 1.7 out of 1.81 -----> http://prntscr.com/6pkg72
OK...completely different.
~90GB used space.
Reduce that a little bit (get under 80GB or so) , and you can, if you want, migrate from the old drive to the new drive.
Assuming, of course, you are completely satisfied on how the current install works. If there are any issues with the current installation, migrating to the new drive won't fix that.