Hi, I had issues with my wifi last week, it was really slow, but only on my macbook on yosemite. All my other devices worked perfectly. So I tried to create a new user on the macbook. On the new user account the wifi worked just fine. I logged back in to my old account, renamed it to "Name_Lastnameold" but not the user folder (I didn't know about that, then) and created a new admin account which I named just as the old one was named before, so I assume the new user folder had the same name as the old one. When I wanted to open my new account today to move the files over to the new account, one message after the other popped up, asking for passwords. Over all finder folders like downloads there was a red minus sign, I couldn't enter the folders. Then I activated the root user, through which I granted access to the folders, just to find out that they were empty. Then I checked the Macintosh HD Space and that only 50GB data is on it. Yesterday it had to be about 180GB-200GB. So my question is, is these data gone for good or is there any way to restore it? I ran data recovery 4 and Stellar Phoenix Mac Data Recovery, but it doesn't find anything. Thank god, I backed up my iphoto library, to move it to the new account, but still a lot of important things are missing now. I would really appreciate it, if somebody could help me.