Key Value Extraction

Hi

I have an asset database with over 200,000 assets. Each asset is assigned to one of the 16 categories below.

I need to extract a file for each category so I can do further testing. I could do this with row filter nodes but that would require 16 separate nodes. Is there a better / more efficient way to do this?

Also, the category list is subject to change (i.e. some categories could be removed or new ones added from one period to the next) so if this could be automated to take this into account that would be great (would save having to manually check categories going forward)

Thanks