League just deleted my other files for no reason!!!

So LOL was having an issue and i had to do a debug I had to do it 3 times cause it kept failing. Then when it finally finished i looked at my second hard drive and what was once half full was down to 1/10 of what it was. Turns out it deleted a lot of my steam games and some important files that had major info for them and now I can never get those files back with the obvious exception for the games. I will never come back to this game knowing that this will happen, the least I can do is let people know and hopefully stop it before anyone else gets hit.
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