Data lost when downloading from web

Good morning,

We’ve been working some days with a new classic survey, and today when downloading all the data, just one part of it passed from the mobile through the computer. We are hoping all the data it’s stored in a server or somewhere, but we dont know where. Is it any place where we can find the server with the data of the uploaded survey. The publishment itself is associated my mail. Any information will be totally helpfull.

Thanks in advance for your help and support,