Best Practices for Disk Space Management in Community w/ lots of Images

[Dmitry_Krasnoperov]

I have several question about images storage/processing

1. I have two folders
   /var/discourse/shared/standalone/uploads/default/original — 9GB in my case
   ../3X
   ../2X
   ../1X
   /var/discourse/shared/standalone/uploads/default/optimized — 4GB in my case
   ../3X
   ../2X
   ../1X

Is there way to keep only optimized images?

2. Does folder
   /var/discourse/shared/standalone/postgres_data/base
   store the same images as folders above?

3. Is there any Discourse settings for storing images in lower quality?

4. Is there any client-side image optimization to make it lower size?