NextGEN Gallery: Use the same galleries on 2 or more sites on WP network (multisite)? [closed]

Question

I have a wordpress network with 4 sites and i use NextGEN Gallery V1.9.13.

On the 2 sites (first and second on network) i use the same galleries. It is a bit waste of hosting space if I need to upload the same images on the 2 network sites.

Is there a possibility to use the gallery of first net site with the second net site?

I tried copy the ngg_options of wp_option(first site of network) to ngg_options of wp_2_option but it doesn't read the base of the first site