Please tell me the approx. space used by Elements for organizing my photos based on facial tags.

I recently used Adobe Elements to organize my photos based on facial tags. The installation drive (which is C partition in my case) started to fill up as Adobe Elements went through my photo collection.. I wanna know how much space it would use for identifying facial tags of 200GB of photos so I can manage accordingly without any inconvenience. Thanks..any help would be much appreciated!