In this case, the user is mistaken. It didn’t replace their local files. They synced the files to a different machine, and the service as stated, gives you wha

In this case, the user is mistaken. It didn’t replace their local files. They synced the files to a different machine, and the service as stated, gives you what it considers de-duplicated files. It’s not a music backup service, and it’s very clear about that. It’s an “upload your own stuff, and we’ll only host what’s not already in our library” Granted it does overly aggressively match songs sometimes, but it still doesn’t delete your content.