Thank you for your answer! And warm welcome. It's only that I cannot download
new programs / software, 'cause there's no more space. I don't understand
that myself, 'cause I doubt Trisquel is using 500 GB. That's why I thought it
had something to do with encryption over-writing free space (?). But like I
said: I'm all new to all this.
I understand that I don't need to over-write free space if my computer is
new.
I also want to learn about proxy and/or VPN, privacy online. I finally
learned about GnuPG, encrypting files and documents, and sending encrypted
letters as attachment. It's very cool, and I'm totally in love with GNU, free
software and Trisquel, even though it's a challenge to someone not educated
within computers. But I think I'm a fast learner.
Great to be here!!