What is an expiration and how does it work? Can I expire my content? Can I self-destruct my content?
While viewing your drop in web browser, click on "Set expiration" button.
From here you can choose whether the file should be deleted after 1 view, 10 views or at specified date etc. Cancel self-expiration by changing Expires to Never.
In the desktop app:
Your drops can be set to be self-destructed by the Team Admin (it won't apply to Personal accounts).