I have a external USB mass storage drive. This is a replacement. I say that because on the previous drive I had set up the permissions so that only I (the owner/administrator) could access it; other users were denied access to the drive.
I seem to have forgotten how I did that because I can't get it set up again on this new drive. :(
I did this before WITHOUT any 3rd party software. I want to do it again the same way.