Lost FD (Important Thing for coledge studuent)

I felt so bad, 3 days ago I just lost my friend's FlashDisk, so that I am not really our relation then because of this  and I am not tell her yet, I am afraid and confused, It problem which made me stuck for a while and have no clue. I knew that It really important to her because a lot data related her script or paper (we are in the same grade in university).

This situation It'll grow bad if I can't manage or explain it to her what kind happend all of this. I sure that It happend outside of mine, It because My Maps falled down at that time and in  inside of it there a my friend's FD. I already looked for day after,because in the first day I did not and the 2nd day I just realise I lost it.

I felt so bad enough, I really that she became angry with me so much and I don't hide for her, We always met for several times, We get same lecture for revision paper. And not only about that we are close friend too. Oh shame on .. I do not know what I must do at that time..

Because she do not know yet about this untill now. Ok I'll write down if she know bout it.. I hope She can forgive me of this..

Now, I'm so so bad condition my familyjust knew that my FD, and situation in my home very so mess up. I didn't talk with anyone, I just told for some reason not more.

Bismillah get me easy to faced kind of this ya allah.