Anyone out there use Search Files module?

I've been trying to use Search Files module to index pdfs on my website. So far I haven't got it to work. I think I may have the directory path wrong. My files are in the following:

sites/default/files

I've tried various relative paths and none of them seem to index. At least I think that's what's going on. Anyone out there able to point me in the right direction?

Thanks so much!