Whatever I do, Spotlight won't search my internal drive. It has no problem searching into any of my externals, but there is no results at all coming from the internal. Wether I specify to look only within Macintosh HD, or don't specify a location to look into at all, none of my files located on my internal show up. I usually use a smart search to find the biggest files to do some cleanup, but it has been a lot harder without the ability to quickly search for those files...