World lost.

I was playing in my survival world while listening to music, when my computer started to crash, I had time to close my world, but it stayed in the "saving world" screen. Then, I couldn't do anything, so I turned off my computer pushing the on/off button. When I turned my computer on and tried to play again, I couldn't select my world, but it is in my .minecraft file.

 

I can't upload it because it says that the limit are 10mb.