The phrase appears to be a mix of slang and a possible typo.
Thus, the phrase could be from a leaks forum: a member named YG (nickname) just finished organizing three ZIP files of unreleased tracks. yg just red up 3 zip
Ty Dolla $ign, Lil Yachty, Babyface Ray, Tee Grizzley, and G Herbo. "yg just red up 3 zip" The phrase