I went to the Apple Store with my Mac because it was impossible to clear up enough storage. He deleted drop box and re installed it, and made me sign back into my account. When I signed in, my entire desktop was gone! He told me it must be on another account (impossible, I showed him emails that show I only have one) and then sent me on my way. I really need to recover these files, and now there are no deleted files (or any files whatsoever) on my drop box. I'm really angry.