Ron has a Samsung Galaxy Note 4 and he's been emailing himself mp3s he makes in the recording studio. The phone holds onto the file for about a day, and then it disappears. Leo says it sounds like the download goes to his cache, which gets cleared out. Leo recommends using an app that will enable him to move it once he downloads it. Samsung's File Manager app will let him see that folder. Astro is another good free option that will let him move his music out of downloads and into another folder. Ron could also use Dropbox. He'll get 5GB for free and he can leave it up there and download it or stream directly.