It just means you are doing a full repair. Your client was corrupted / modified before update.
I had to download only 670 MB here
my ncsoft updater is the problem, since i deleted the game last years and download this *rap again, he never updates, the only way i figured out to update was doing repair to the cliente. (dont know if u guyz remeber i m cursing this *hit software back there cos it delete the backupfolder i left on pc)
today i got the messenge, "trinkle update" or something like that, i let this *hit software update, but when it finish it says that i need to update, when i click that, that *hit starts to repair the cliente, then i took that pic and post here, canceled and try again the update thing. looks like this *hit is working fine now.