To lose or not to?

I have no idea how to react to this… I found one of my pendrive that supposedly got lost in March this year… and in there I found a few things that could have helped me in my previous semester if I had it then. Now I wished I never found it, but yet I am glad that I found it. OMG, this just means that I am such a clumsy untidy stupid idiot. Urghh.