Snow White is a reference to the 7 super computers the CIA HAD that Q confirmed in post 143 that were at least partially taken down between posts 2009 and 2014.

Edit- just came across this article which may or may not have further implications: https://www.zerohedge.com/political/previously-unreported-stash-1200-emails-between-staley-and-epstein-emerges-some-reference

Snow White is a reference to the 7 super computers the CIA HAD that Q confirmed in post 143 that were at least partially taken down between posts 2009 and 2014.