so what happened was that i have spent a year building battle ships, rockets and houses and when i looked today chunks were missing so i saved the game and went back into it to find that it wouldnt load so i went off minecraft and opened it again a few minuets later to find out that the world had gone and ive now found it in the cached data and cant get it back and ive went through all the files and theres only files from last year so now ive lost a years worth of work