My phone is a Verykool phone from claro. Its android version is 4.4.2. And recently I wanted to download a game on it. But I didn't have much space on my storage. So I went on the STORAGE located in the SETTINGS app. There it seem like the MISC files were occupying a lot of space (MB). So I deleted something that had about over the 400sMB. Later I normally downloaded the game I wanted. But when I tried playing my songs from the MUSIC app, a message pops up saying "sorry, failed to open file". But somehow only the songs I downloaded from MUSICPARADISE app, which are the majority of my songs, aren't able to play, except the songs I downloaded from the BROWSER, which are t only 3 songs. Please does anyone know what was that I accidently deleted and if I can somehow re-download it. Please and thanks in advance.