Recently re-installed maplestory What are all these files? In C>Nexon>138 Full Client Installation I have MSSetupv138.exe, MSSetupv138.z01, MSSetupv138.z02, MSSetupv138.z03. In C>Program Files x86> MapleStory I have similar files. What are these things? Do I need to keep them? They're taking up a crap ton of space..