text: Yes, delete the original.  There would be no point in zipping a file if it required the original to work.\n\nAlso, look in your temp folder(s) and delete temporary files, they can take up a lot of space.  Don't forget to clear your browser cache, too, and/or set it to not keep a whole lot.  This may make browsing a little slower (or a lot slower depending on your connection speed), but it will keep the disk from filling up with stuff you've seen on the Web.