Blizzard
Build 10904
We're rolling out an update that will allow players to reduce the amount of data needed to install World of Warcraft PTR when World of Warcraft is already installed!
This will significantly reduce the download size and disk space requirements for installing and updating the two versions.
Players who have the WoW PTR currently installed can uninstall and reinstall the PTR to take advantage of the space savings.
Please leave any comments via the feedback portal in the Blizzard menu!