world keeps deleting saying there isnt any back ups

I've spent 200 hours in this world almost and i would really not want to lose it! it isnt a Tmoded world but id still like some help. I have looked into the documents and the world is still there. Then go to the recycle bin and restore just for it to delete all over again saying failed to load. I even did rename of the back up file and it did not work. So i need help getting it back if possible.