Thank you both.

I've been reading the FScrawler web page.

My operating system is on my computer's C drive. My pdf files (to be indexed) are on one NAS. I would like my index to be created on another NAS.

Kibana is stored in c:/kibana

Where should I place my FScrawler snapshot ?

If on the c. drive then how/where to specify the folder containing my pdf files ?