Actually I read into the EULA and it only talks about viewing your RAM which is called memory, they probably thought that meant their hard drive
Anyways for anybody who wants to read it themselves: http://store.steampowered.com//eula/333930_eula_0
Edit: also the guy that posted it tracks your data turned it around on himself, being a total ass and saying the anti cheat tracks your data, and than stating that there is no anti cheat, so basically wtf stuff reviewer?
There's a whole lot wrong with this.
First off, that's not the XIGNCODE (the stuffty anti-cheat) eula or privacy policy. That's the NEXON eula. They're two seperate things. They don't actually provide that directly on the site, iirc you have to agree to it when you sign up and install the game.
Also, there's an absolute plethora of evidence that it does actually look through your personal files.
First we can look at the reviews:
"Got perma-banned (for "third-party software") after having played a bunch without a hitch. I'm assuming it was
because I forgot to delete my desktop shortcut to Process Hacker (the anti-cheat doesn't like it because it has "hack" in its name and XIGNCODE is just about the worst anti-cheat ever) and
the damn anti-cheat scanned my system."
http://steamcommunity.com/id/theslimystray/recommended/333930/The anti-cheat detected that he had a desktop shortcut to something that had the word hack in it, and then it suspended his account. There are other reviews like this too, like this one:
http://steamcommunity.com/id/tehsys/recommended/333930/ "Got banned for using Process Hacker. wtf?"
Second, we can look elsewhere on the internet. A google search for "XIGNCODE Privacy" shows up one reddit result:
https://www.reddit.com/r/DFO/comments/30tcb6/xigncode_looks_at_all_files_youve_accessed_in_the/"XIGNCODE looks at all files you've accessed in the last 48 hours and sends the names to their servers?"
It links to a forum about anti-cheat bypassing. I'll summarize: One of the users reverse-engineered the software and found out that it scans all the files you've accessed in the last 48 hours, the names of the windows currently open, and other things, then sends it to their servers.
One of the comments also links to this picture:

Where the XIGNCODE process is shown scanning through his files, including browser cache (Which may include browser history, and definitely falls under personal information) and his research folder.
Third, he didn't say it doesn't exist. He says it might as well not exist because it's stuffty and there are tons of hackers because it's stuffty.