Unfortunately, some people have to undergo the loss of important data before they understand the importance of backups. Duplicati is a free software that automatically takes care of regular, encrypted backups, using external storage (including OneDrive and Google Drive). Please recommend that to your student.
SoSci Survey will delete the data 3 months after the most recent login to the survey project (valid for www.soscisurvey.de). That means the student has either deleted the data themself or has logged in to the wrong survey project.
They shall send me the URL of the project, please, so I could check the logfiles. If the data has actually been deleted, we can try and recover them from the server backups. However, there is al lot of work involved for us, and therefore we introduced a "barrier" few years ago:
- The student can either donate 60 € to a charity/non-profit organization of their choice or
- they can translate a chapter from the SoSci Survey manual from German into English.