The time taken to download a flow as one ZIP file, can take quite a long time particularly if submissions include large file sizes such as video material and can take as long as 20-30 minutes in such cases.
On flows with big media files and few participants, it often pays to download the files one at a time.
However, it is possible if the time has been exceeded that the process may have failed, for example a misalignment between participants and their cover sheets. We suggest trying to reset the ZIP file generation process by reordering the export. If the problem persists, please contact your licence administrator.