There’s no going back. The cloud, and especially software as a service (SaaS), has become the default for the way we work.
It doesn’t matter if you are using IaaS, Paas or SaaS tools, users share a certain level of responsibility for protecting the data they create.
You, as the user of a SaaS tool, are responsible for ensuring that only authorized users have access, and any data or metadata that is created is properly backed up.
Finally, you need a process for backing up and restoring lost data.